How to Tell if Your Home Thermostat is Bad - Bypass it and Find Out

How to bypass an HVAC thermostat. Do you want to know if your home thermostat is bad, defective, or malfunctioning and that is the reason your AC or furnace is not working? In this video I will show you how you can tell if your thermostat is bad. Along with simple troubleshooting tips. You will simply need to bypass the thermostat to see if the problem really lies in your thermostat or not. Also, here is a list of what the thermostat terminals mean:
G= Fan
Y= Cooling
W= Heating
R= Power
Rc= Power to Cooling
Rh= Power to Heating
C= Common
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
➡️ Here is the meter and jumpers that I had in the video:
UEI Multi Meter: amzn.to/2ufcucc
Magnetic Jumpers: amzn.to/2L1wPZN
Mini Alligator Jumpers: amzn.to/2N067S1
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
🌡️ Thermostat Playlist:
• Thermostat Playlist
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
For More Repair Videos:
🔌 Dryer Repair Playlist:
• Dryer Playlist
🧺 Washer Repair Playlist:
• Washer Playlist
🔥 Furnace Repair Playlist:
• Furnace Playlist
❄️ AC Repair Playlist:
• Air Conditioner Playlist
💧 Water Heater Playlist:
• Water Heater Playlist
🛠️ HVAC Tools Playlist:
• HVAC Tools
🔋 Capacitor Playlist:
• Capacitor Playlist
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
📝 AC Parts Reference List:
1 Pole 30 Amp Contactor: amzn.to/2tdICNB
2 Pole 30 Amp Contactor: amzn.to/2JWlI7Z
SPP6 Hard Start Kit: amzn.to/2JSPieo
30+5 MFD Capacitor: amzn.to/2M4M83O
35+5 MFD Capacitor: amzn.to/2JXTVUs
40+5 MFD Capacitor: amzn.to/2yrugyr
45+5 MFD Capacitor: amzn.to/2MG8ZDY
50+5 MFD Capacitor: amzn.to/2M7RFGY
Qwiklug Compressor Wire Repair Kit: amzn.to/2JWmsdh
3 Amp Fuses: amzn.to/2JViUYO
1/4 HP Blower Motor: amzn.to/2tfifXT
1/3 HP Blower Motor: amzn.to/2K63HQL
1/2 HP Blower Motor: amzn.to/2trGVeM
3/4 HP Blower Motor: amzn.to/2tqsKGX
FM55 Blower Motor Bracket: amzn.to/2MbdYeK
5 MFD Capacitor: amzn.to/2K5NcHn
10 MFD Capacitor: amzn.to/2tqP7ft
15 MFD Capacitor: amzn.to/2MJZzHU
30 Amp Disconnect Fuses: amzn.to/2JYcSGH
25 Amp Disconnect Fuses: amzn.to/2tgcJUC
20 Amp Disconnect Fuses: amzn.to/2tcEFsM
🛠️ Refrigeration/Air Conditioner Tools:
R22 and R410 Refrigerant Gauges: amzn.to/2uM1GDx
High Side Replacement Gauge: amzn.to/2x6rIlo
Low Side Replacement Gauge: amzn.to/2x9SskK
R410a Refrigerant 25lb: amzn.to/2p2PACx
Refrigeration Wrench With Hex Bit: amzn.to/2uM1MuT
Tube Cutter 1/4-inch to 1-1/8-inch: amzn.to/2OdRbQX
Tube Cutter 1/4-inch to 2-5/8-inch: amzn.to/2CLUYnj
SuperCool Slide Rule: amzn.to/2QdbcZx
Ball Valve Refrigerant Hose Set: amzn.to/2wSbETX
Low Loss Refrigerant Hose Set: amzn.to/2wQazfy
HVAC Fish Scale: amzn.to/2oRyI1O
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
🛒 For a Complete List of Tools and Parts Visit my Amazon Page:
amzn.to/2Q3QTOA
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
🅿️ Want to Support This Channel? You can donate via PayPal:
paypal.me/WordofAdviceTV
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
📷 Interested in What Gear I use to Film my Videos?
Sony A6300 16-50mm:
amzn.to/2OmLSPF
Sony 35mm Fixed Lense:
amzn.to/2LPAU3A
Extra Batteries:
amzn.to/3c8QBj1
Memory Card (2):
amzn.to/34rcwQ1
60" Tripod:
amzn.to/2mLXrU0
Bird-Eye View Tripod:
amzn.to/3b3RWYy
Rode VideoMicro Microphone:
amzn.to/2Ol9KDp
Rode Wireless Go Microphone:
amzn.to/3ed5Wkv
Neewer Halo Light (2):
amzn.to/2LTANUK
Viltrox LED Light Panel:
amzn.to/39ZbSu4
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
🙏 We would greatly appreciate it if you considered supporting our channel while shopping on Amazon by buying anything you need on Amazon after clicking on one of the links above. This gives us a small commission at no additional cost to you and helps us continue producing more videos! Thanks a million for your support!!
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
⚠️ Disclaimer:
This video is for educational purposes. All appliance and HVAC repair work should be done by a trained professional. Word of Advice TV is not responsible for any possible damages or injuries caused by the use or misuse of the provided information.
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
📥 SPONSORS / Collabs:
Would you like to partner with Word of Advice TV? 🤝
Email: [e-mail] ✍️

[@romeparrilla8307]

thnak you so much for all your clear videos,you are actually helping lots of poor people,god bless you always my friend,cheersssss.......

[@alb4580]

Watched Several of his videos ... They are exceptionally informative in layman terms. His simple details on the videos leave little to question... My hats off to him! and thanks for saving me a wait and a service call.

[@tanyaroy5409]

I am very appreciative....you deserve to be recognized for the help you offer....believe me without your video I would literally bake in my apartment....I live in Arizona and someone I live with took the cover from the thermostat so I would have to suffer the heat.....Yes crazy right? But that person only wants to see me suffer...and be hurt....or have to struggle....anyway enough about that! Your awesome and I just want you to know that I am so grateful and could never thank you enough! You are needed for your knowledge in this matter. Thank you! Thank you! Thank you!

[@1ugh1]

This is Da' BOMB. Now i don't have to swelter while I'm waiting for our new thermostat to come in. Nice and cool in TN, USA - Thanks!

[@AdmiringGolfBall-jj8jm]

Thank you, sir. I learned a lot today. Keep doing good work. You're a great teacher.

[@lex6794]

Thanks Man, trying to be an HVAC Technician!

[@davidzorko6791]

You did a fantastic job, explained everything well on what was going on with everything. Used your testing method, fixed my issue. Thank you!

[@jollyscaria1922]

Rc 24v power from cooling tranformer R24v power fro heating transformer ycomperssor contacter y2 compressor conttacter stage 2 g fan e merfncy aux het rely lseds out put when set to em heat c 24v comon ..

[@essakadiri8577]

One very important thing he forgot to mention is NOT TO JUMP "R" to "C" or be VERY careful not to touch the "R" to "C" as this will burn the fuse on the control board or trip the low voltage fuse inside the furnace. In most cases you will not even know you did this as it will not spark or anything. The fuse is like a car fuse that sits in a slot on the control board or sometimes a button on the housing where the control board sits.

[@josephguida5432]

Excellent comment.

[@abstractlight1620]

What color is "C"?

[@essakadiri8577]

R is usually the hot wire with 24 volts and C is the neutral wire, so if they touch it is like putting a wire from one hole in an outlet to another in the same outlet !! but because the voltage is 24 and not 110 or 220, it usually will not spark and not electrocute someone.

[@TiE23]

Yeah I just accidentally jumped R to C (red to blue in my case). Thanks for revealing the fuse in my furnace. Found it. Going to the auto shop tomorrow for a replacement 3A blade fuse.

[@amberwilson6246]

I just jumped R and my entire board sparked and went blank…uggghhh

[@mcelfreshiii]

Brother you just saved me a $200 service call, and gave me an excuse to get one of those nice app based thermostats. Plus it's my birthday today. It started off bad, but seeing that I saved at least $200, and learned a bit about my furnace, that's the best gift I've gotten all day.

[@WordofAdviceTV]

Happy Birthday bro!!! :) Glad to hear the video helped you figure out the furnace problem and get it fixed! Enjoy the new thermostat and stay warm!

[@babur729]

What a terrific way of explanation 👌 Keep up the good work .

[@user-yk3vb2cq8x]

Thank you for your vids - super helpful and appreciated. I have a problem with no power to my thermostat but power at the board. Happened last night during a rain storm - probably unrelated but not sure why it would just stop working like that. The breaker is fine and the board is getting power. Thermostat connection reading 27 volts at the board. I also checked if the the water pump was working or if the float tripped anything but it appears fine. Any suggestions on what else I should look into? Regardless, thank you for these vids. Really helps to understand 👍

[@johnmebrahtu9622]

Expert always nice I love all your videos Jay. Thank you so much.

[@jackburns5373]

Thanks for all the videos Jay, I was in school for hvac before covid came, all your videos on all this are really helping fill in some blanks, only on video 10 of 60 for your ac videos! plan on watching them through! thanks again! big fan!

[@jojo-tn5hj]

I don't know ANYTHING about hvac..but recently had a recharge since i have a slight leak. I'm sure many have told you already but I just have to say, THANK YOU so much for all your videos. I've watched them to learn and understand what's going on so I can educate myself. You are doing the community such a service. You are concise, clear and don't spend your time wasted on technical jargon. IMO, that demonstrates how well you know and and understand what you do. Please don't ever stop sharing whatever you do, you are so absolutely appreciated by the community!

[@JoseRamos-ob6pw]

lol that’s what I’m saying It’s green ground?

[@ricksminecraft]

Wow! I can't believe what I've learned in less than one hour here. Thanks. I am an electrical and computer engineer, but until today, my central air system was just a big "black box" to me! Glad to have that cleared up.

[@rmsevastra]

Great job! You are a very good teacher. Explained the essential elements of the problem/solution in a easy to understand and concise manner. Thank you!

[@WordofAdviceTV]

Thanks! Happy to hear you liked the video :)

[@norvellwilliams8442]

hello love the video,s question i have a payne package unit that will not come on unless i pull the face of the thermostat off and then it only run for one cycle and dose not get to the thermostat setting. what do you think is the problem ?

[@kevinruth2594]

Thank you for that info!

[@dylanlarose9171]

my thermostat s!@# the bed, and its freezing out. the jumper wire just saved me a trip to the store tonight!

[@shivaHVAC]

Sir how does it works...how it controls fan motor speed in 3 speeds...my single phase fcu motor has 3 wires....low ,medium,and high... Without thermostat ,I just tried to connect live(230v) wire to low speed winding...no power trip... But if I connect live wire to medium and high speed windings.power is getting trip...what is the reason sir... without thermostat how I can run the motor in high speed?pls help me .

[@jarredr6622]

Can I just wire red green and white and leave it on all winter... I like it hot. Lol

[@13688mjon]

This worked for me. Thanks for posting

[@13688mjon]

Should I remove the small jumper wire I made after it turns on or leave it there?

[@danb.3397]

VERY WELL DONE, THANKS

[@Hvac-dude]

How do the jumpers work I've always been curious

[@WordofAdviceTV]

Its literally just a piece of wire with little alligator or magnet attachments on each end.

[@raviyadav8743]

Thanks for good information sir

[@WordofAdviceTV]

You're welcome! Thanks for watching!

[@royabboud8201]

I’m getting 16v only on my C and R wires! My new Honeywell thermostat is not turning on! What is causing it? When I switch the electricity on, the fan turns and the thermostat display remains off. Can you help?

[@brookeanderson7840]

PERFECT! EXACTLY what I was looking for! Our thermostat broke (new one won't be here for a few days) but our AC was fine! Just needed to turn it on!!!

[@hvac24]

Hey Jay Where can I find those magnetic mini clips? Off Amazon? What do I search up?

[@WordofAdviceTV]

These are good ones: amzn.to/3WcQEEn

[@mikealexander2005]

Awesome video. It worked. Just one question and it's probably a stupid one. That's all I need to do until they can come fix the thermostat right? It's running now and will continue to run until I flip the switch. Is that a safe way to run it?

[@HopeOverComesFear369]

Okay before I comment am waiting on a replacement but what I did was because the one am working on is a Emerson Thermastat (and it’s a 2-stage furnace )for one not everyone’s furnace is the same and everyone thermostat is different too but I am basically doing swap but am interested in learning but anyway so power I shut off and the issue is the thin connection for the battery broke from battery exposed acid on it but tested the wires and found out the blue and white wires are giving me the resistance or continuity beep sound on my meter and I feel like my installer wreg the wire unless am wrong because the one am working on seems like the wire are in a different color code but it works no issues just the battery melted the connection piece the back end of the battery touches so besides that I noticed from the furnace board and beginning actually at the transformer at my two load leads blue and white had beeping there and on the board at Y&Y2 I had a beep there ,then at the thermostat at W2&Y it beeped but thes area colors don’t match from the motherboard to the thermostat is what throw me off but wanted to share because I wanted to bypass but I don’t want to risk the board so got electrical heaters until replacement part arrives just wanted to share the experience and hear what anyone has to comment back

[@alamocolleges]

What if you are going from an older 4 wire thermostat to a newer thermostat that specifies a green, fan wire? The new thermostat is the Honeywell 6580 that you showed on video. The HVAC is a Rheem

[@williamsliemers1758]

Mine has RC;RH;WB only wired and the RC and RH are jumpered and white wire is on WB the furnace wont start up at all.

[@kckc6578]

So you should have the power OFF when connecting the jumpers and then once attached turn the power back ON?

[@WordofAdviceTV]

It is the best to do it that way, yes. Because if you accidentally touch R to C and the power is on, that would blow a fuse.

[@billhandymanbill2775]

Great video. Thanks much! As a suggestion, I would first start with red and green wire (fan) with the jumper since there is no timer or limit switch on that circuit. By using the red and yellow (A/C) you might turn on the timer/limit switch because the A/C compressor has a high and low side for pressure and possibly damage the A/C unit. If you activate the A/C timer/limit switch, the A/C unit may not operate until the time/limit switch times out.

[@Googlename699]

I have checked the thermostat, it's OK. Then I checked the Control Board. And disconnected the 9-pin molex connector. I found out pin 2 Main Gas Valve (yellow) is shorted to pin 1 GND (Green). Is that normal on the Rheem board? Thank you,

[@jcr7434]

Thank you so much....I was with out a.c. I did this and it worked...Im changing the t-tat tomorrow

[@ricardoguzmanoritz14]

Hello, It is posible to turn on your compressor AC from a Mini Split, using a thermostat when the furnace control board only have the letters W,R,+,B?

[@67gt500snakebite]

Thank you for your Videos. They have helped me out a lot. And no the video was straight forward, and not confusing at all. We DIY People appreciate your work.

[@issalitty4266]

Question is, how do you turn it off after turning it on?

[@HsingSun]

You can set it on or off from the display setting, but depends on the manual or digital model.

[@robvoyles]

If you have gas heat, you only jumper red to white as the white call will energize heat and the fan without green being jumped. Because gas heat fires the gas first while delaying the fan, the fan will be brought on by time delay. if you have a heat pump, wire red,green,yellow,orange....those four together will call for the indoor fan, the compressor and the reversing valve.

[@BlackMagic58000]

So if a thermostat isnt energizing G on the thermostat side. Can I bypass it by wiring G to C? Or do I have to jumper G to energize with cooling/heating respectively based on season?

[@intelin123]

Nice. Next time dont add your 2 cents. Make your own videos. If your not willing to answer questions dont act like you care.

[@Sorg22]

Rob, thank you for adding your two cents. It was appreciated and I don’t have any emotional connection to whether you care about me or not… (like Others.)

[@davidsteinberg2805]

Where did the orange wire come from?

[@kyongvincent4385]

I have no idea about electricity. I will try to jump the power for heating on thermostat, is there any risk to have shock from wires? How about if I use paper clip, so I hold clip to jump. I don't want any burn or shock.

[@mustafamalik4211]

Are RC and R the samething? My R and RC are connected with a wire. When trying to bypass, I connected my R/RC with Y, did I blow a fuse? I don't have an alone C switch

[@trespasser121]

Rc is power only for cooling only, so if you don't have A/C you'd not have it connected to R. When connecting to Y, the A/C should start,

[@mustafamalik4211]

@@trespasser121 nothing happened immediately, but after a week or two, a capacitor blew and had to be replaced.

[@trespasser121]

@@mustafamalik4211 Probably not related. The A/C capacitor is rated 240+ volts

[@tmixes]

i have this same furnace a trane td080r93641. week ago wife called and said the thermstat was melting (the switch melted), so I changed the thermostat and i got no light at the board, so I changed the board. new one came and it was different from the old (just like the one in your videos). Still no light . transformer was bad , changed it . now i get 28 volts to the board. The thermostat wires letters werent matching up (board m1,m2,g, y, c, and twin) ( thermostat rh,r,g,y,c,b) . realized the board is for a two stage furnace, so I went and got a multi stage thermostat now the theromstat letters work out better. started it up it ran good , then shut down . i blew the low voltage fuse , replaced it and it blew right away. the only difference in the wiring was the the board schematic said yellow goes to the Y2 and the thermostat schematic says the yellow goes to yellow. i have it in Y2 the board i took out and the thermostat were wired for single stage. something isnt making sense.

[@WordofAdviceTV]

Hey Chris! Sounds like you had quite a project there. So after all that, now the fuse blows right away? To begin with, put in a new fuse. (you will need a pack of them unless you have a 3 amp breaker you can wire in instead) I would take off all the thermostat wires at the control board and then put them back on one at a time to see which wire/s is causing the short. After you figure out which wire is the culprit, it will be easier to chase down the short.

[@woofymodder]

I have 20 something volts to all the wires except my blue c one, what do you think it is?

[@uchihasasuke8942]

Hi want question I buy a new thermostat and install everything the same way ,and when I put in auto only my ac turn off and on but my fan don't turn off and on my fan stay on all the time

[@derekc6713]

Thank you for the great video. I have a question with regard to the bypass. You mentioned that it is better to turn the furnace switch off After you find out if the thermostat is getting power to do the bypass. How can the motherboard gets power to turn on things if you switch the furnace off, am I missing something?

[@janettelanuiki]

WTF? Green is “fan” MF isn’t there a “ground”?

[@woodybear8298]

Why in gods name would they not make the green wire the ground? It is everywhere else.

[@troypick2825]

That was a good advice but I have a question for you my furnace keeps short cycling and never gets up to intended heat what should I look for and can I jumper this to bring house heat up

[@markdierking9347]

Jay, after replacing the control board didn't solve the no heat problem and numerous other checks using your vids, I verifieded with a paper clip at the furnace and then the thermostat that it is the thermostat that I replaced a few months ago either was bad then or more likely I didn't throw the breaker and ruined it. I have just ordered another Tstat. Thanks for all your help. You saved me again and never have had to spend the money on a teh visit

[@qiaochen6066]

i have only heating furnace but it has two wire white connect to w, and red connect to B, is red suppose to connect to R? i want to by pass thermostat to test if it's bad or not can i connect w to B? would it cause any issue?

[@biblioholic7139]

Thank you so much. Just got my furnace back on after my thermostat died using a 📎 because of this video 🥳

[@ShouldYouBuyIt]

I have a blue and common wire at the furnace, but only a blue at my thermostat. Should I be putting blue in b or c?

[@HsingSun]

Blue is in C terminal.

[@saiyan-lord4714]

ok so apparently someone already jumpered the RC to R. So i jumped R to Y and nothing happened. Meaning it is not my thermostat. I have 240 volts to contactor for outside unit. When i manually engage contactor it turns on. So something is not engaging contactor. My mother board to my outside TRANE unit is Very small and nothing like yours. No fuse either. Im down to thermostat wire, motherboard or contactor(which is least likely of all). I do not know how to check my mother board as i said it is completely different and very small (size of my palm)

[@WordofAdviceTV]

Have you watched this video yet? It may give you some more ideas of where to look: kzbin.info/www/bejne/hIezmaaBacx-Z6M

[@paulacash6044]

I set temp for heat & thermostat will black out, Eventually it will come back on. Sometimes it will not reach the set temp.

[@HsingSun]

Did you set heat temperature at 68 degree?

[@ishaqhussain3892]

🙉🙉🙉Music sound at the beginning and at the end is irritating🙉🙉🙉

[@DragonTailDiabloBlkDT-ACE]

So if you’re able to turn on your ac the thermostat is good??? My ac comes on and off is the thermostat bad???

[@quando3411]

Do I have a listening problem ? Jumped R to Y for AC unit, switched back on, " AC unit will turn on, If not thing happen then you know your Stat problem " was I listening correct ? Thanks so much for the great video

[@WordofAdviceTV]

Sorry for not being clear enough. You were almost right but it is actually like this: If your AC unit is not turning on at all but when you jump R to Y at the thermostat everything turns on, then the thermostat is bad. (or it has weak batteries)

[@bjsongster9784]

Hi Jay, I’m a landlord and I’ve learned a lot from you but now I have a new problem! My outdoor unit don’t work no AC! It’s deader than a door nail! I have 240 v coming into the unit! When I depress the contractor it activates the compressor so what could be wrong? I think it’s the thermostat but I didn’t follow your video cause I don’t have a separate heater but I have an air handler in the closet so…. Please let me know what I’m missing besides a brain! Thanks! Your friend, Barry

[@WordofAdviceTV]

Hey Barry! Sorry to hear about the AC troubles! If it comes on when you press in the contactor, then I would suggest watching this video to try to track down the problem: kzbin.info/www/bejne/hIezmaaBacx-Z6Msi=ilw7FtnaJEVuhXb2

[@lequang2296]

Great clip my friend Very helpful . Thanks

[@MountAthosandAquinas]

Jay, help! Today I noticed that he AC unit wouldn’t come on at all, so here are the steps I did: First, I took readings with my multimeter at the thermostat. 24 volts Then I checked outside at the contactor and I had 24 volts going in. Came back to the thermostat and thought it could be a broken thermostat. So I created a little jumper cable like you said (running red to yellow), and bingo! The AC unit came on. So this indicated that I may have a bad thermostat...then, I messed up. Even though the compressor and the fan came on, I still didn’t notice any air blowing out of the vents in the living space. So I thought, oh, I must have to connect the red to the green one (fan) and the yellow (AC) together. Then I thought, “well, I might as well connect blue, yellow, green, and red together.” So I twisted all of them together (but first I shut off the disconnect). Then I flipped the disconnect on and now I have nothing. And when I went back to separating them and putting them back into their designated spot in the thermostat now I got nothing. No voltage, and the thermostat is completely dead now. Now I don’t know where to go...perhaps I blew a fuse or something? Any words of wisdom?

[@WordofAdviceTV]

Hey Nick! Sorry to hear about your troubles! It sounds like either your thermostat may be bad or perhaps weak batteries? It would have been okay if you wired G, R, and Y together.. But G is for fan, R is a hot wire (24v) and C is a common. By connecting R and C, a direct short is created. Most likely your 3 amp fuse is blown. It should be in the furnace control board. After you replace the fuse or reset the little 3 amp breaker, I would watch this video next as to why the blower is not coming on: kzbin.info/www/bejne/gITKfXqKdsd3fJo

[@MountAthosandAquinas]

Word of Advice TV , you are the best...nailed it! Thanks for the help!

[@peterlakers1]

How do you jump-start at the board

[@2LIVCREATE]

Thank you for sharing! I TRULY APPRECIATE your vid of CONCISE INSTRUCTIONS 👌🔧 😊

[@WordofAdviceTV]

Happy to help! :)

[@craigstreit9478]

If you want cooling, do you need to jumper both the cooling and the fan? Or do you just need to jumper the cooling and the fan will be automatic? Thanks

[@marktrachtenberg8474]

What would happen if you accidentally jumped the power and common? Would it kill the transformer, flip the breaker, or something else?

[@WordofAdviceTV]

Most furnace/air handler control boards will have a 3amp fuse that will blow. If there is no fuse, then yes.. You may need to replace the thermostat, control board, or transformer. If unlucky, then all 3.

[@PATTI1962able]

Question I have is the temp gauge in the thermostat says when it reaches hot or cold set temperature. This was not mentioned. My cooling temp set to 75 cooling but will keep running way beyond that before shutting off. What is going on there? I manually shut it off and on...not the best. Thanks.

[@WordofAdviceTV]

That sounds like a bad temperature sensor in the thermostat. Can't really fix that so the fix would be a new thermostat.

[@portescity2299]

Thank you very much for your vídeos, I appreciate it very much !! Just one question to bypass the thermostat should the unit be off? Thanks

[@WordofAdviceTV]

It doesn't have to be off. Just be careful not to touch R to C as that would be a direct short and will burn out the fuse.

[@the_sameer_saikh]

Sir can please uplaod this video in hindi subtitles 🙏

[@camronconway439]

Question: I did the jumper and was able to bypass the thermostat. I took them off to give the system a break. Then when I added it back, I accidently jumped R to C, and now when I use my voltmeter there I cannot find power. What do I need to do?

[@timjb3376]

My HVAC Tech can't seem to find an issue with my furnace unit. (12 year old 1 stage unit house built west coast in 2008 attic unit which, I am not that flexible in maneuvering around) What I am experiencing however, sometimes (more often than not with heating)is the heat will come on (not always), then the fan will either be a delayed in turning off by 30 minutes by up to an hour and a half after reaching target temp. Or the the fan won't turn off at all unless I manually go to the thermostat to the force a fan idle signal be sent to the control board which will then turn it off around 15 to 30 minutes later when it use to be about 5 to 10 minutes after the heat cycled off. I have tried taking the thermostat cover off to turn the fan off but the fan keeps running. He did say their is a fuse in the unit but it is not blown and previous visits has ruled out rollovers, and high limit switch triggers. When I watch the thermostat I will hear the system cycle down when it does heat and reach target tempurature usually around 73 deg, but the thermostat fan will never switch to fan idle and 10 seconds later the fan kicks back on and stays on. Then after the fan cools the house down again the furnace will kick on and reach target temp and then sometimes the signal will successfully turn the thermostat fan setting to idle sometimes it wont. So I was curious if this sounds like an issue with my 3-4 year old SMART thermostat, or if something else might be causing the issue.

[@jeffreyking5428]

would that work to energize it

[@sarahhughes1461]

Ok no power going from thermostat control panel to contractor. Help ran new wires from being weed whacked. What am I missing. Control board checks out good 24 v coming out.

[@sudeshputran69]

Super

[@notcharles]

It would have been MUCH better if you showed a closeup of the contacts you were talking about as they are tiny and difficult to see as you flip through the presentation. Folks do not need too much focusing on 'jumping' per se. Basically, if you show how to jumper with a paper clip, we can figure out that a twelve dollar magnetic jumper wire would do the job. What we need to know are the wire colors (and their labels) for the respective functions (heat, Cool, Fan we are looking to rest.

[@Rhiorrha]

My Honeywell thermostat started acting wierd today. The display would stay lit, and the "Set to" area on the left would flicker rapidly. The unit would run for like 3 minutes, then the thermostat screen would light up and "set to" and the desired temp would start flashing, then the outside pump would shut off, and a minute later, the inside system. Now the "Set to" area is completely gone, showing only the internal temp, and I can't get the unit to power on. I tried the Jumper trick with a set of needle nosed pliers, and got nothing. Can a dying thermostat take system down with it?

[@AMERICA_CARR]

I should of done this as a kid when my parents would lock out the thermostat and I couldn’t change the temperature

[@coffyemmanuel]

I’m not receiving any power in the cables. Where’s the furnace located ?

[@WordofAdviceTV]

The furnace is usually in the mechanical room, laundry, or basement. If not in any of those locations, then in the attic or crawl space.

[@getsmartpaul]

FYI, It just started getting warm and my A/C stopped cooling/working , the Cool temp was set to 83 and the current temp in house was 85. The fan in the house was working but I went outside to see if the compressor/fan were going but it was NOT. So, it was NOT being turned on by the thermostat ( or the fan/compressor/capacitors were bad ). So, I changed the batteries ( 2 AAs ) and then tried to turn on the Thermostat but it stayed in the OFF position no matter what the COOL or HEAT setting was. So I went to chatGPT AI and it said to press the RESET button on the thermostat ( using a small screwdriver to push into the reset hole ). Voila , the Thermostat re-booted and I was able to set the Cool temperature and startup the A/C. So, with a good DIY attitude and Jay you can fix things too !

[@tomcat548299]

Thank you so much for the video! I have no display on our thermostat which means I can't get our heat to come on obviously. The breaker seems okay however I simply cannot get any power to the thermostat? In your video you said once you use to jumper cable if nothing happens then you know it's not your thermostat. Not sure if I heard that wrong but wouldn't it be the opposite if nothing happens then something's definitely wrong with no power or display on thermostat? Thank you in advance and sorry for the inconvenience.

[@WordofAdviceTV]

If you jumper R to W at the thermostat and the furnace turns on that means the thermostat is bad or the batteries are dead on it. If nothing happens, then the problem is in the furnace. The furnace is supposed to send 24 volts to the thermostat and maybe it is not doing that for some reason. Have you watched my Top 10 Furnace Problems video? That one has a lot of furnace problem scenarios. One of them may be what you are experiencing :)

[@dansofi]

Hi, I have a question my Thermostat works but it do not stay at my set point if i set to a temperature like 80 it will start a/c but bring the house temp to 74 or 72-- A/c start & shutdown but not at my preset temp--I changed Programable thermostat to Manual Round Honewell but same --I cleaned the control board at furnace where there was some water leak above furnace whole house dehumidifier-Please help

[@Gargoyle75-t8m]

Hello and thanks for the help! I need to bypass the 2 speed fan control with capillary on my ancient central air unit until the new switch arrives. Blue,black and red wires. Thank you

[@yolandawilliams5894]

All I Needed Was A Paperclip HA! And Voila!!! I threw the Jumper away, didn't know I needed it. Didn't matter in the winter but Nowwwww Lol, it's hot. A Paperclip duh 🙄,. Thank you!!!😊

[@buddcee]

where does my thermostat get power from? i have no power at thermostat.

[@cavyboy99]

What about a thermostat causing short cycling. How do you know if that's the problem. Everything else is fine. The refrigerant is good, the dryer is good. ....so

[@WordofAdviceTV]

It could be a loose wire or a slew of other things. Have you watched this video by chance? kzbin.info/www/bejne/fXa5f4aohNeinqMsi=C5Qo_QBvV3_m9VYP

[@cavyboy99]

​@WordofAdviceTV thanks for the replay. Replaced the switch on the inside unit to a ball bearing, and for some reason the previous owners wired my thermostat to gas and not electric. I have a total electric house. It hasn't short cycled since i changed it. But it always short cycled when it was 93 degrees or higher outside. Now we don't have those temps. So guess I'll have to wait until next summer to see if it actually fixed it

[@Silvermeow]

What if u dont have C, how do you measure

[@dextroc1874]

Thank you Dude!! Just replace my thermostat and the technician did not do a by pass from R to RC and my AC turned on. The oil provider ROB here in NY is charging mr for 125 dollars diagnostics and 215 per hour of labor and plus for parts and blah blah blah!! I just did it my self bypassing..

[@susanpare7615]

can a bad thermostat throw a fault code or lock oit your A/C? I have a Ruud with this problem. The board has 28 vac.

[@SupernovaSun77]

Great video. So for the nest I have it says I need a common wire. I bout the 24 v adapter. Plug the white n black into C and the white into R with the red wire too tight?

[@NoahAusten]

just hot wired the thermostat and the furnace works. Thank you.

[@pauljs33]

What's the solution if there is not 24V on the red terminal? I have 24V on the control board where the transformer attaches to the control board, but no voltage at the red terminal at the thermostat or on the red terminal on the control board. Should I take the thermostat off and measure resistance between red and all the other terminals to see if there's a short in the wall? Question: shouldn't the 24V on the transformer connection be directly connected to the red wire connection? They are at opposite ends of the board, but I assume this should be a direct connection. There's a bunch of other functionality on the board that I'm not using for gas igniter, etc. Could leaving these connections open be inhibiting the voltage for safety reasons? Thanks for all you do! You're my go to guy when I have HVAC issues.

[@WordofAdviceTV]

Sorry to hear about the AC troubles! I would first try to figure out where you are losing power. To answer your question, the transformer supplies power to the control board and then the board sends power to R. Is there power at the furnace door switch? Is it closed? Is the 3 amp fuse good? (sometimes its 5 amp or a mini circuit breaker if it's a Lennox) Does the transformer have power going to it? (120v) Does it output power? (24v) If the transformer is outputting 24v, yet you are not seeing it on R, that usually means the board is bad.

[@pauljs33]

@@WordofAdviceTV Actually, this blower has no door switch. Interestingly, the other blower in the house has one. I plan to take resistance readings on the thermostat wires and then regroup.

[@woodst408]

Great video....if you jumped the thermostat it works..so what is wrong then..is it your thermostat or something else? That is the issue I am having. My screen shows room temperature and nothing else...but when jump A.C. comes on. Should I change my thermostat?

[@WordofAdviceTV]

If your thermostat has batteries, try replacing them first. Otherwise yes, I would replace the thermostat.

[@RonnyHyman-zj7wf]

Hi so I jumped thermostat and AC turned on, then I turn unit main switch off while putting cover on, then turned switch on and got a red blinking light

[@uptownphotography]

In the winter (about 4-5 months ago) my outside AC compressor was coming on when the furnace was on. I turned the AC circuit breaker off to turn the power off to the compressor as there was no other way to stop it from running w/the heater. (I figured I'd deal with it in the springtime. Now that it is getting hotter outside, I went to use the AC yesterday (turning the circuit breaker back on first) and neither the blower fan motor or compressor is coming on with the AC (will not work even in HOLD mode). If I switch the thermostat back to heater mode, the heater works fine. I did notice also, turning the fan switch on the thermostat will not turn the fan on, but again the fan works in Heat mode. Is this likely a thermostat problem (which I am guessing it could be)? Any ideas would be deeply appreciated. Also, I do have a voltage meter to test thermostat if I know the procedure. I would guess 24 volts from red and common. THX. The thermostat is a program-able Ritetemp model 8022C.

[@Doc62J]

So glad I found this video. I thought my contactor or short cycle relay was bad. After watching this and jumping the terminals I determined I had a bad t-stat. New batteries didn't fix it. New one installed today and everything works! Thanks for posting this.

[@tompham4272]

Great instructions video for thermostat test. Easy to understand. can you speak slowly For next video please????

[@susanheath1813]

Another excellent video but sadly nothing happened on jump. Have been going step by step at least I can rule out the thermostat. No fuse in sight, connector works when pushing in, have a Payne and no obvious or accessible float valve when I tried to check. The mystery continues thanks for sharing your expertise

[@stevewolfe1872]

Thank you so much I tried what you suggested, saved me a service call of $70.i installed a new thermostat.I didn't turn switch on back to gas or oil, I guess I shorted. Any ideas on a decent thermostat please. I bought a cheap 25 guess goofed lol

[@WordofAdviceTV]

As long as it works, it doesn't really matter which one you get :) I personally like thermostats with less buttons. Unfortunately I don't have any recommendations for you though..

[@joncrosby8988]

There certainly are things that are much easier to understand, than they are to explain! You did a very fine job. (I even got it the first time, before the well summarized recap. Thank you for taking the tine to share!

[@creators-lens]

Hi Jay just a clarification..if you jumper it if nothing happens that means your thermostat is good?? Please clarify thanks...

[@thembones12]

Thermostat is a automatic switch ON/OFF. Remove the Cover...If you connect Red and Yellow(AC) it should start the AC. If you connect Red and Green it should start the Fan. And Red and White is Furnace/heater...

[@creators-lens]

@@thembones12 thanks for the reply. I got it. Mine didnt start when i jumper it which means thermostat is good and the problem is somewhere else. Actually what the problem is with mine is the contactor outside the unit ut was shorted the coil only reads 1.3ohms.

[@gotstoloveafreetrial9831]

Hey love your videos! This guy from the worlds worst ac company, came in and completely ruined my ac unit! I need help with a few questions. I wish i could send photos of the mess he made. Ok i was having to manually turn my unit off from the breaker because my fan outside kept spinning after the thermostat was off. The ac was blowing fine and cool Ok i knew it was the contactor that was bad. My home insurance sent out this con artists who knew nothing about ac. It’s sad. But i explained it to him and told him it was the contactor . He insisted it was thermostat. Ok he changed thermostat after 5 hours and then said oh it’s the contactor. 😡 said he had to order new one i said well put everything back for now at least i can go back to manually using the ac. He left new thermostat on plus He leaves without letting me know. So i go to turn on ac it’s blowing out really hot air like emergency heat air plus i hear the compressor on outside. So i call and ask if someone new can come. They send the same guy out and i tell him it’s blowing emergency heat. He changed my contactor to s new one and it still isn’t working. So i tell him just put everything old back on and I’ll just call another company and pay out of pocket. So he puts my old thermostat back on. Now my thermostat doesn’t come on at all and he says my transformer is bad because i turned it on and off from breaker damaged it. Coincidence to me that my thermostat is now not turning on. I just said get out of my house! He has a jumpstart wire on w1 and E can that have anything to do with heat coming on instead of air?. sorry for long post I’ve been watching your vids all day. I just feel i needed to vent to you. If you read all of this thanks 🙏🏾

[@WordofAdviceTV]

Oh boy.. Sounds bad. Sorry that you had to go through that. If that guy didn't know what he was doing, he could have really wired up a mess... I am a little worried about the new contactor that he put in. Hopefully he just went wire to wire and didn't put anything in the wrong spot. As for the thermostat.. I don't work on many heat pumps so I can't tell you what to do with it without looking at it myself.. There's another channel called AC Service Tech, look up some of his videos on how to wire a heat pump thermostat. He has some good videos.