HVAC Electric Heat Strips and Components: Explained, Voltage Path, Resistance Readings!

[@acservicetechchannel]

Tool List- www.amazon.com/shop/acservicetech Support- www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Here is the Link for the newer UEI DL479 Multimeter with temp sensor- amzn.to/2jtsUbJ Here is the Link for the newer UEI DL469 Multimeter- amzn.to/2jw4ePJ Here is the Link for the UEI DL389 Multimeter used in the video - amzn.to/2naJr9o Here is the link to the Fieldpiece SDMN6 Dual Pressure Testing Manometer with Pump-amzn.to/2jyK5Ka Here is a link for the Supco Magnet Jumpers amzn.to/2gS4h6z Here is the link for the Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V Other tool links can be found in the video description section. ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.

[@AIRCONDITIONINGSCHOOLING]

I need your help on understanding something, can a gas furnace have heat strips with it?

[@mapa5000]

When something is well explained, it's always easy to understand. Thank you for sharing so much knowledge. !! 👍👍👍

[@acservicetechchannel]

Glad it was helpful!

[@b-2466]

There is nobody that i have been around that can explain things in a simple to understand manner. I'm so thankful for this channel.

[@HfJax]

Best channel I’ve ever come across and thanks a million for putting all the effort and time to share your knowledge god bless

[@acservicetechchannel]

Thank you Hamid! May the Lord Bless You Too! Have you also seen the new air handler strip heating video I just put out?

[@siahduehning3667]

Excellent video! - most of these other hvac guys are about as articulate as a bag of rocks - you did an excellent job explaining this material in a precise and helpful way. thanks!

[@acservicetechchannel]

I am glad you are enjoying the videos!

[@tunazzi]

I love your videos. As an electrical contractor . OL on the meter stands for (open line). N.O. = normally open as it sits for contacts.

[@acservicetechchannel]

Hey Tunazzi, OL can also mean over the limit of resistance that the meter can test, meaning an extremely high resistance. Open line and over limit are the most frequently used terms. I believe everyone uses the same description for NO and NC, thanks

[@jewdali1]

Thank you for all you do to explain things . You are a good teacher . May God keep you .

[@acservicetechchannel]

Thanks Salvador!

[@chaneyelnumero1]

Your vids shows that you are a great teacher, learning a lot from you!, thanks and keep them coming!

[@acservicetechchannel]

Thank you very much chaneyelnumero1! I wish you a blessed Christmas for you and your family!

[@yonofui9682]

AC Service Tech LLC ....I need to get in touch with you can you send me a way to do it I need to ask you a few questions about hvac I’m new in the field an need help

[@victor.mnoriega3586]

Thank you for all your training, you are a very good teacher, I am really learning Thank you so much.

[@jacobreed7060]

I like to way you explain everything thoroughly. Great job!!!!!

[@acservicetechchannel]

Thanks a lot Jacob Reed!

[@edilsonserafim4784]

One of the best channel I have seen I learned so mucho from it thank you for helping other people achieve their gols

[@acservicetechchannel]

Thank you for your support!!

[@austinjabs7134]

Man! I wished I took your class, this is the best explanation anyone has ever given to me,,very helpful Thank you good Sir.

[@acservicetechchannel]

That's awesome to hear Austin! Thanks for your comment!

[@TheWarrior831]

Mind blown. You made it so easy to understand. Especially, the electricity path of travel. Other channels fail to do this.

[@acservicetechchannel]

Check this one out too on the 24v wiring of an air handler and heat pump! kzbin.info/www/bejne/Z5-0aJ6VjZeUjqM

[@bobrebera494]

great job-knowledge never gets old-explaining how things are done-priceless

[@glenguzman0383]

Im an hvac tech. Finally I.have found this.vid lot of info. Thank.you

[@acservicetechchannel]

Thanks nelg, enjoy the channel- kzbin.info

[@pipi7731]

Very good video and well explained. Thanks

[@luiselizalde6757]

Excellent your explanation, thanks a lot, teacher, Guys if you want to learn, keep watching these videos, really good teacher.

[@acservicetechchannel]

Thanks a lot Luis!

[@DrewNutts]

One of the best explanations! Great video!

[@acservicetechchannel]

Thanks Snoopy!

[@gilbertopatino2616]

Thank you for another excellent video!!! merry Christmas and very happy new year.

[@acservicetechchannel]

Thanks Gilbert Patino! Have an awesome Christmas and a great New Year!

[@williampaul8979]

Best tech around

[@jacobreed7060]

Could you post a video with elements also explaining more in depth the fan relay and blower motor wiring. Or am I just not seeing it if you already have one. I know that's a lot to ask but you are the best instructor on you tube. Thanks for all your hard work!

[@acservicetechchannel]

So I apologize but I do not happen to have something like that yet. I do however have 240v blower motor diagnosis and how it works, and thermostat, heat pump defrost board and air handler board wired all together and what is happening, and a video on how fan relays work. Here they are. Always feel free to ask because that lets me know what people are looking for. Also check the playlists such as Heat pump troubleshooting or Blower motor troubleshooting or any of the other playlists and just pick the videos you are looking for through there. That is what I tell my daytime students. -- kzbin.info/www/bejne/q3m7qGullL6ikM0 -- kzbin.info/www/bejne/d3aYq4WNqdGbd6M -- kzbin.info/www/bejne/nHevkI2JoKaNg5I -- kzbin.info/www/bejne/p5qkgKmAndZrldU&list=PLxnHR5_D2ojzDfU1IjPpzdhi_mUGe3F7W&index=8

[@harryappliancesrepair8587]

Excellent video thanks i m learning so many things everyday thank you sir

[@acservicedaytona386portora3]

Again Explained Very Well, Merry Christmas And Happy New Year...

[@acservicetechchannel]

Robert, I hope you had a very Blessed Christmas. Praise Jesus!

[@DreamLand20]

Thank you. was very useful.

[@SombraLocs]

Another great video! Have a Happy New Years!

[@acservicetechchannel]

Thanks Familia Sanchez HVAC, have a wonderful New Years!

[@robert_blackmon_fishon]

Great video.

[@mariobryant8803]

Well explained in terms of the components

[@acservicetechchannel]

Thanks a lot Mario! have you seen my newest one explaining heat strips and the voltage path!

[@PBS-nm1uu]

thanks another great video , please keep them coming.

[@airmechanical7163]

Great explanation.

[@acservicetechchannel]

Thank you very much Air Mechanical, have a blessed Christmas!

[@oldengdg2575]

Great video. I have your book. This acts like an or gate as far as sequence control. For 3 or 4 element I suppose you just repeat with an additional circuit breaker and the 2 element sequencer. Is there a 3 element sequencer made for 220v circuits ? Gotta wonder, probably not.

[@urbanojuarez3268]

sir thank you for your videos . keep them up !!!!

[@acservicetechchannel]

Thanks Urbano!

[@drummerdem50]

Another excellent explanation. Thanks and Merry Christmas

[@acservicetechchannel]

Drummer, thank you and Merry Christmas to you and your Family. Let the Lord be pleased by our actions!

[@roelvargas6195]

Good job 👏 👍 👌

[@acservicetechchannel]

Thank you so much 😀

[@samuelvalenzuela4541]

Very good info, great teacher

[@acservicetechchannel]

Thanks Samuel!

[@donnierobertson3088]

Nice job

[@acservicetechchannel]

Glad to help Donnie!

[@papajoe3832]

Great video with usual detailed, non-assuming information offered so all experience level techs can understand. If the two strips heaters are typical 5KW each or pull ~21 amps @ 240 V, please address the size of L1-L2 source wires which appear to be smaller (less ampacity) than the wires from the terminal block to the sequencer and to the strip htrs. Perhaps camera angle/depth causes an illusion. Thanks and Merry Christmas with best wishes for the new year.

[@acservicetechchannel]

Hey Papa Joe, You are very much correct! This was only for quick testing purposes and you are right, I should have put 6 gauge on the top. I will put a note in this video and I will put a fixed note in one more I am editing. During the installation the wire must be rated for the max amps of the fuse or breaker that the unit is calling for. Thanks for pointing that out. I was not sure how much of that was going to be visible and this strip kit is sitting on my workbench. Thanks Papa Joe, always a pleasure!

[@gonzgarr1592]

nice video with great technical info thanks

[@acservicetechchannel]

Thank you gonz garr, have a blessed Christmas!

[@Josh-px6xb]

So heat strips don’t need a separate circuit right ? Or do they?

[@PaulHVAC1]

Excellent excellent video. Merry X-Mas and Happy new Year

[@acservicetechchannel]

Thanks Paul HVAC, Merry Christmas!

[@waterheaterservices]

These vids are very helpful

[@acservicetechchannel]

Thanks Jim Rr!

[@zachos2]

Good video

[@acservicetechchannel]

Thanks Zachos2!

[@eman3208]

Thank you for all your videosss!

[@acservicetechchannel]

Thanks eman3208!

[@elcaminodelconversoyeljust8120]

Thanks for the class..

[@acservicetechchannel]

Glad to help!!

[@dcrickerson7611]

Another very nice video.

[@acservicetechchannel]

Thanks DC Rickerson!

[@orlandochairez7369]

So this is a 2 Heat strip and each pulling 5kw for a total of 10 kw? So you would need a #8 wire?

[@sdrtech]

Your correct the relay is not needed just run the 24 volts straight to sequencer

[@TruckManVFL]

I would like to see video covering a heat pump that no matter the temp wants to run aux heat any time the call for heat is active.

[@acservicetechchannel]

Thanks for letting me know what you would like to see!

[@gpsperez5193]

Question about the transformer it is normal for the transformer to turn warm or kind of hot ?

[@carolinacleaningandpropert9322]

Good evening, in a system just like that one. What cause the blower to run constantly non stop even when system is turn off?

[@shawndellwilliams2541]

Great video well explained thanks

[@acservicetechchannel]

Thanks Shawndell!

[@alchemyphilosophersstone2634]

Great video!

[@acservicetechchannel]

Thank you!

[@56rmax]

Great job man. I really appreciate it.

[@acservicetechchannel]

Thanks Russell!

[@752fer]

Great video 👍🏼

[@acservicetechchannel]

Thanks Fer p!

[@mark.r8900]

hi, sorry but i am a little confused. one end of the heat strip is getting 120vac (blk wire), the other end is also getting 120vac (blue wire). so how does voltage path goes from L1 and back to L2 when both ends of heat strip has 120vac? please help as i've trying to figure this out for awhile now. thank you to you and all your awesome videos.

[@acservicetechchannel]

So the 240v finds its way back through the other hot. 240v doesn't use an additional common. It has to do with the sine wave of the voltage being 180 degrees off from the other one so they don't interfere with each other. This frequency happens 60 times per second, thanks

[@madurasenju2015]

Hey service tech . Can u explain but a little deeper ? So if if there’s no call for heat , and I put my meter across one side of heat strips and the other end I should be getting 240.v since it’s open . But when call for heat it should read Nothing as it’s close .? Or am I complete wrong ? Please help thanks in advance

[@tapan1008]

nice teacher. thank you. please upload more.

[@acservicetechchannel]

Thanks tapan1008!

[@jackpast]

Great lesson, Craig. Merry Christmas and Happy New Year!

[@acservicetechchannel]

Thanks Jack, Merry Christmas and happy new year to you and your family!

[@wlouis7583]

Appreciate the videos.

[@acservicetechchannel]

Thanks Wesley Jean Louis!

[@troyspoor7748]

Im looking for a good book to purchase for my son on electric heat. Sequencers relays limit switches. Any suggestions on a good book

[@megawhitesox0574]

do you have a video showing how to change the lennox g-61 ignitor"?

[@acservicetechchannel]

Not that specific one, sorry!

[@sincityhvacr]

great videos merry christmas to u and your family

[@acservicetechchannel]

I have very much enjoyed this Christmas and the kids are getting older. I thank the Lord Jesus for each day. Thank you very much HVAC/R junkee and have a blessed time with your family!

[@sincityhvacr]

thank you sir

[@sodman1987]

Why would a coil be glowing(on) with only one side powered with 120v. Other side discomnected....possible short to ground?

[@1984juant]

My question is how do I know what are the kilowatts for the whole heating kit knowing the resistance of each element? And Some kits dont have the info anymore so the info on the furnace or heater box, is the sum of all heaters or for each element.? Thanks

[@texture6]

The Sequencer, Sort of reminds me of the CSR in a compressor. electrical Induction

[@acservicetechchannel]

Thanks texture6!

[@willardearl76]

On this application, would you run the white wire to the fan relay? Would the sequence of operations be? 1. White tstat wire calls for heat and closes fan relay. 2. sends 24 volt signal to sequencer. 3. Closes 4-5, then 2-3?

[@dhguard1]

What size of heat strips are correct or recommended for a 2 ton heat pump. Thanks for all the information it is really good.

[@acservicetechchannel]

Hey Ruben, honestly that will all depend on your heat loss for the house as well as where you are located at in the country due to design temp. What I mean by this is if you are working with a conventional heat pump and it is 10 degrees outside, the heat pump won't be able to provide much in terms of heat and all you are left with is your supplemental heat strips. In this case if you were stuck with heat strips only then you may want to go with the higher kw ones. If this is florida or somewhere where the temp does not go down very low then the heat pump will always provide some heat and your supplemental strips can be less such as maybe 5kw and not the full heat load. We cant go just by the size of the existing heat pump size but you would need to know how much total heat you need (heat loss) and the design temp of that area. I hope that made sense, thanks

[@dhguard1]

acservicetech thanks it is really helpful.I' m in NC.

[@pl747]

I have a question about the high dollar furnace boards. Why do you even need them when you can do both heating and air with a simple thermostat, sequencers and/or relays?

[@acservicetechchannel]

Some units run heaters on sequencers such as some overhead garage units and such. Ha ha yeah it is crazy right? It is all about efficiency and control of OEM parts I think.

[@Alex-yk6he]

Thanks for reminding!!!

[@acservicetechchannel]

Glad to help Alex!

[@chrislewis9345]

Had my electric meter chekd and it's fine but he said that the heater when we turned it on it was pulling over 100amps.Does this sound possible and if so what would be the cause?Also this is a carrier heat pump and the heat still works but he was saying that it's the culprit for the high bill?

[@RineboBohead]

Sooo helpful!!!!!

[@acservicetechchannel]

Glad to help Rinebo0011 Bohead!

[@kazekagetilo]

Thanks

[@acservicetechchannel]

Glad to help Stefano!

[@pba21]

That looks like a 10kw heating element. How do you determine the limit switch rating? Awesome 👍!!

[@acservicetechchannel]

You can use ohms law by reading the resistance of the coil and the current when powered. current= voltage/resistance thanks!

[@rgcme33]

When the defrost board energizes the W terminal during defrost to turn on the heat strips, should the thermostat aux indicator light up?

[@acservicetechchannel]

Hey Randall, only if the Emerg heat and Aux are jumpered together. Defrost powers Emerg heat and it may backfeed voltage to the aux.

[@kinggenius6660]

good video thank you

[@acservicetechchannel]

Thanks Doug c!

[@donnierobertson3088]

Second time watching 10/7/2020

[@yopeacee9472]

if those blue wires are 24v... then shouldnt the blue wires go on the 24v coil of the relay instead of contact terminals???

[@lichotropical3350]

Where are the quills located on this unit????

[@kevedamanyo]

Great videos! I am doing an all new install of my Gibson/Nordyne 4 ton split system heat pump/air handler. My 24kw heat strip has three 60 amp breakers and my unit is 30 feet from the breaker box in my house. I have to use the HUGE size wire for those three 60 amp circuits don't I? I had been thinking I was going to use a bunch of 10 gauge wire and have an easy time.....

[@acservicetechchannel]

You definitely cannot use something as small as 10 gauge. You would have to look at the wire length to determine if 6 gauge or 4 gauge to each breaker would work.

[@uruiamnot]

This would have been a great time to cover the "W" circuit that requests Aux heat, and the many things that could cause it to go awry... like on my heat pump. This looks a lot like my mom's electric furnace, but my Trane heat pump has a (failed) large 2-pole contactor and a problem with the 24V control circuit for Aux heat. 2 strikes and it's out.

[@acservicetechchannel]

Yes many have sequencers and/or contactors. I have videos specifically on those, thanks uruiamnot!

[@soneeeee4440]

good vid. need some help, i'm up north, first freezing cold day today since the winter, -13c. So my heat pump is off, aux heat strips took over in the air handler. It is a Trane 4tee3f37b1000aa, system about 12 years old. Noticed when the aux heat starts, there's a machine gun rapid fire/chatter sound at the air handler, right about where the red 20KW line comes in. i'm not really familiar with relays but could it be relays that turn the strips on and off?? (sounds like a machine gun, fairly loud if i put my ear on the panel). Once the heat gets going and the fan is up to speed, it seems to stop, and then starts again a bit when the heat cycle shuts off. I'm still getting aux heat but not sure if the 4 strips are all working 100%. if i lost a strip or 2 out of 4 would the others continue to work or would they all stop?, Is there a fire hazard if either a strip is burnt or relay coils chattering furiously. Or could this noise be something else like arcing at the strips? If its a relay, how long can it function like this? is failure imminent? i am diy, have diagnosed and fixed blower motor and module before and other basics like outdoor cap.

[@papoloco34]

like always thank you!!!

[@acservicetechchannel]

Thanks Pedro and Merry Christmas to you and your family!

[@papoloco34]

Thank you!!! Merry Christmas for you to...

[@michaelo061]

Great video! I didn't see the high-voltage, for the blower motor. Is it usually 240v or 120v?

[@acservicetechchannel]

Yes forair handlers it is usually 240v there is usually a fan relay on a control board or a fan relay by itself or a sequencer, thanks!

[@treymanning8633]

I been having issues with duel fuel troubleshooting. The gas ruud units with heat strips. Do you have any help for me?

[@acservicetechchannel]

Do you have a model number? What kind of thermostat are you using?

[@treymanning8633]

Thermostat was a manual suited for a heat pump with switch for em heat and heat. Only the gas would come on in both modes. This is my first heat season as a new tech. My company I work for half do stuff. I want to learn the right way how to do thing.

[@acservicetechchannel]

Have you checked this video on dual fuel wiring? ---kzbin.info/www/bejne/fpnLlqagfZ51jas --or air handler wiring to hp thermostat-- kzbin.info/www/bejne/nHevkI2JoKaNg5I ---- you may want to check out the thermostat troubleshooting playlist for other troubleshooting tactics as well, thanks ---- kzbin.info/aero/PLxnHR5_D2ojzDfU1IjPpzdhi_mUGe3F7W

[@marylamb6063]

Does this heat strip connect to an entirely different circuit apart from the air handler itself?

[@acservicetechchannel]

It is usually all one in the same. Always follow the install directions from the manufacturer though, thanks

[@larrycummings4532]

I have a Tran Model TWE030c140A0 XE1000 unit, my fuse in the thermostat in blow 3am when the heat come on? it is in the thermostat, or the electric Heat?

[@acservicetechchannel]

It could be the therm, therm wires, or relays. You could first try jumping bypassing the thermostat to see if it is the face that is the problem, thanks

[@hurstmuscle]

Why would the heat strips come on every time the heat does? The thermostat setting unchanged, no AUX indication shown.

[@barrettkirk8587]

From the transformer to the fan relay is it just supplying 24v when it is called upon?

[@zwspiller7888]

Yea basically the relay is just completing the circuit for the heat sequencer 24v

[@JeremyCrescendo]

@@zwspiller7888 I have a test on this tomorrow wish me luck

[@zwspiller7888]

@@JeremyCrescendo good luck man u got this

[@acservicetechchannel]

How did you make out on the test Jeremy? Thanks Zw Spiller for stepping in for him!

[@zwspiller7888]

Anytime man thanks for all the hard work and great content!

[@beeart90]

What causes my electric heat strips to come on and off by itself? Thermostat off. Is this a sequence or a relay problem?

[@acservicetechchannel]

It could be the sequencer, the thermostat, or thermostat wires, thanks

[@beeart90]

Thank you for your response it helps. Have a wonderful Christmas.

[@whiteboyfromernul]

whats the purpose of having that fan relay before the sequencer?and why dont you show the fan wired in with it?to show an actual functioning unit

[@acservicetechchannel]

This video was just on an electric resistance heat strip kit. This is just one version of a heat strip kit. I may in the future show the wiring included with an air handler board. Thanks

[@khuongvtube]

Thanks for great video, I have 20kw heat strip hkr-20c, 4 coils and 5kw on each. And one of the coils was damged or broken, which was caused by loose connection at one of the two double stacks sequencers. Can I still use the other 3 coils assuming I will replace the bad sequencer and leave the broken coil out of electrical connection from the sequencer plus making sure the damge coil are not touching other coils?

[@acservicetechchannel]

Yes you could, thanks

[@officerkrupke4966]

There is no inrush current for resistance heating. The same amperage is felt in circuit when resistance heat is first turned on as it is a minute later, an hour later, and so on.Inrush current occurs in motors, high amp draw to start, than a lower amp draw after up to speed. If ckt. cant handle both heaters coming on at same time, it still wont handle it if they are staggered.

[@acservicetechchannel]

You are correct. That is a resistive load.

[@luke9129]

Why did you take down the heat strip video you released today? I was halfway through it and really enjoyed it and wanted to see the rest of it sir

[@phillipjoy8191]

I have always wondered why some mfgs use a contactor instead of a sequencer. Enjoy the video

[@acservicetechchannel]

Thanks Phillip Joy!

[@VFL0000]

semper fi..

[@acservicetechchannel]

Thank you for your service!

[@VFL0000]

oorah..My pleasure.

[@jameswestergard9237]

Blowing 30 amp disconnect fuses after a couple of min when aux heat comes on. Pulling 41 amps. Any reason why. Still researching

[@marioventura564]

6

[@tslimproductionz]

If you can't understand this guy, then you are clearly in the wrong field.

[@acservicetechchannel]

Glad to help, thanks!

[@tobyblevins4637]

where did the red wire coming from my blower fan go my account shut off and it's disconnected think a rat knocked it off or tape got old not sure

[@acservicetechchannel]

Does it say on the connection diagram for wiring on your unit? If it is a red wire from a psc blower then that usually means low speed, thanks

[@tobyblevins4637]

please email me at [e-mail] it's a 97 goodman blower has a brown wire loose to I'll send pictures

[@acservicetechchannel]

I am sorry, I only answer comments and don't do consultations. You would need to follow the wiring diagram, specifically the connection diagram. Make sure that the power is off and you have read no voltage with a multimeter before touching any wires. If you are not an HVAC tech then I can only advise to call one, thanks!

[@tobyblevins4637]

if you can help me out I appreciate it