DIY Honeywell t 87 thermostat mercury bulb

[@themrhelperguy]

If I have helped you and you would like to support my channel, you can do so by shopping on amazon through this link: amzn.to/2CS7ZKn Thank you! _As an Amazon Associate I earn from qualifying purchases._

[@mathissr.4294]

Thank you buddy I appreciate it..

[@rjdelaronde]

Heat anticipator. You’re my hero. Thank you.

[@themrhelperguy]

thankyou for the comment

[@caseykittel]

I think you’re easy to understand. Thanks for the video. Don’t let idiots make you feel bad. You’re helping people. We appreciate it.

[@Jacob-kh3eg]

Dear Sir, This video saved me. I was living in a new apartment with this type of thermostat. I am a spoiled white kid who only ever had to face off with digital thermostats. I want to express my deep gratitude that you took the time out of your day to make this video. Although it may seem like you are difficult to understand, a little close listening is all it took. Do not listen to the hate, TheMrHelperGuy, you are a bastion of all that is right with humanity. You are a hero. Thank you. Jake

[@whith5184]

what does the 'white' have anything to do with this? lol

[@theworksbyt6264]

@@whith5184 he was explaining that he was white piss off lol

[@arcanondrum6543]

@@whith5184 ..asked the 'white' girl...

[@Bihexual]

To this day you’re helping people. I moved into an old apartment after living in a modern one, this thermometer stumped me for weeks. You’re a life saver.

[@themrhelperguy]

I've been trying for 10 years.

[@OfficalVOID]

Does anyone know how to change the bottom temperature.(mines stuck at 80)😅

[@kyliejean228]

We just moved into and apartment with one of these. It says its 70 degrees or so but it is freezing in here. Mind you it's about 50 degrees outside. I'm not sure the heat actually works and I'm a little afraid to touch the dial

[@themrhelperguy]

If your thermostat is set at 70 on the upper part and the lower part is more than 5 degrees lower than that you might have a problem. Today would be a good day to turn up the thermostat which means you are going to have to touch the dial and make sure the heat comes on. Good luck kylie.

[@MrKid3247]

Just moved into an apmt and bc of your video I realized they had my unit overshooting the temp way too much . Just wanted to say thanks bc Your video was the only one I could find that explained the anticipator . Thanks again brother

[@themrhelperguy]

Yes the heat anticipator is a common problem when furnaces over run the temp. With oversized furnaces it's a little bit of a balancing between overruns and short cycling

[@BlondieHappyGuy]

I realize that this is an older video, but I just wanted to chime in on the "accuracy" thing. Very often, the thermostat may not actually be mounted perfectly. As this uses a mercury glob that uses gravity to move, the thermostat must be mounted 100% level! It's interesting that on "new" versions of this (they are not good... but) they have a flat spot right on the top so that you can use a little level to make sure it's 100% level. On these older types, it's a bit more difficult, but you can put the level across the 2 little clips, on each side (that clip on the cover) as your guide. Once this is mounted properly, the accuracy should be good. Also, on that, the thermostat MUST BE CLEAN inside. If the "spring" gets dusty or dirty, it will not react to temperature correctly. If one is comfortable, one could remove it (not during heating season is best) and give it a very good clean.. GENTLY. Perhaps just using a Q-Tip dipped in Isopropyl, shaking off the access first.

[@lcorvette]

How do you adjust that little thing down at the bottom? My thermostat is set at 60 in the basement but the temperatures up to 70 so I turned my furnace off - help!!

[@RaZorblade_SunshiNe]

Maybe you can give me an idea of whats going on with mine.Its exactly the same as this thermostat.Its 64 in the house and it comes on at 62.I want the house to be 70.I turn the thermostat up to 70,but it will just run for a long time and not actually reach 70..who can afford to run the furnace like that? So I will have to turn it down to 60 in order to shut it off.I just noticed the anticipator was at .6 shld I adjust it? Im just trying to figure out why the temp in the house will only maintain 64

[@dmprdctns]

Hi. Great video! Do you think there is any way to adjust the thermometer on an older T86A7 with the smaller dial? There's no way to access nor adjust the thermometer "spring" thing.... The back, beneath the mount plate only shows like the end of the metal dial shaft embedded in the plastic but with a manufacturer's non-tamper goo-seal across it... I mean, I'm a really mechanically minded fellow and I can't see any way to remove that dial / knob... The thermometer is sluggish and off by about 7 degrees F above other thermometers, here. (including a Honeywell that looks like yours with the easy access adjusting screw on its back...) But, the T86A7 has no access whatsoever... A pity because its a gorgeous little piece. I only use these classic thermostats around the house as thermometers only and are not hooked up. Thanks...

[@Holyghost089]

I’m trying to turn off the heat. I’m turning the dial all the way to the left, and it doesn’t seem to be doing anything. The weather is really warm right now where I live and the temperature on the unit says it’s over 80. If you can help I’d really appreciate it.

[@yomom2509]

hey!! i’m having the same problem now too! did you ever find a solution?

[@komalpreetsinghmultani1881]

At what temperature it will do cooling????

[@post.10]

Thank you for this video. You have helped me. Sorry about the rude comments of others

[@themrhelperguy]

Comments just come with the territory. Its is nice to be able to help someone.

[@noro305]

Fighting with mine now with ut cycling on and off... just moved the anticipator 🤞🏽

[@ogrebread]

Thanks, I was scratching my head trying to figure out what controlled the bottom temperature. After watching this I facepalmed my way to understanding. Very helpful.

[@TheWillysparks]

How the f*** did you understand this jackass

[@doitperfect9420]

I understand him clearly.

[@chenrobbins]

+Jason Esbensen If you can't understand it and other folks can, maybe the problem is you?

[@BlazenBM16]

How can I take this type of thermostats off so I can replace with a new one?

[@nadiamoriah]

Hi! I have a Bard thermostat like this. Does the anticipator have a release switch or can I just push the part pointing to the setting to 0.5? It looks like on the video there’s a metal tab to the right of the metal arrow pointing to the setting. Also, any more information on Bard thermostats like this I’d love!

[@stevena.matuszak1414]

Fascinating! The thorough, patient presentation helped me understand this thing. Much appreciated.

[@LoganFranken]

I just wanted to tell you that I really appreciate the time and effort you put into this video. Thanks for posting it!

[@themrhelperguy]

Logan Franken glad I could help

[@1pitchblack]

themrhelperguy My ac is coming on and going off! Help!

[@hotwheel6663]

Logan Franken Not this Guy again! Man can't understand?

[@MRS_HYDE_1995]

I cant get my baseboard heater to shut off! I have almost the same thermostat

[@Mm.kay.]

Thanks for the video! I have a question...I just changed out my old Honeywell thermostat. Everything is connected where it should be. But my problem is that I cannot get the system to start up! It's driving me crazy. We have an older model furnace(?) it's a Crane Line...I cannot find anything on google about it. Any idea on what I should do?

[@themrhelperguy]

Kayla Santos could by many things. Make sure your system switch is on heat if you have one. Does your new therm have batteries. Sometimes the r and b terminals are hard to read. If you just can't figure it out take the thermostat off the sub base and jump out the red and white terminals your furnace should fire up. That will at least make sure nothing happened in the wall during installation. What did you replace the Honeywell with.

[@themrhelperguy]

themrhelperguyKayla if you can't get it to run I will need more information. Especially what kind of therm did you replace it with.

[@kaylasantos5198]

I replaced it with another Honeywell. The old one was similar to this one you had in this video- it had the mercury bulb. Now, the new one doesn't. It's a ct87n model for heat/cool (the old was ct87a). I jumped the wires like you said and it worked! My heat is currently working, so I know there's nothing wrong with the furnace. Maybe I am using the wrong thermostat? There was two options at the store, one that supports heating and cooling and one that only supported heating...so maybe this is my issue?

[@themrhelperguy]

Kayla Santos if your furnace is heating only buy heating only thermostat. These are good thermostats that do not need leveling. But please read the directions there are little switches on the back of these that need set.

[@themrhelperguy]

Kayla Santos your ct87n should work. Make sure red goes to r and white goes to w. The top two system switches need set to heat and the other set to auto.

[@KEEP_YOUR_THUMBS_UP]

Thank you for your video. It helped me finally understand the ins and outs of my thermostat and set it correctly. Thumbs up 👍 and God bless

[@themrhelperguy]

That's great to hear. Good luck

[@summer3245]

can you hear the click with this kind of thermostat i just install that kind and i can't hear it click on

[@themrhelperguy]

the thermostat with the little mercury ball do not make a click noise. You cant buy these anymore. The newer electronic ones have that click noise when the thermostat calls for heat. There may be electronic ones that do not click buy every one that i have run across give that click noise.

[@yylevin90]

How do I fix mine if its broken is there a battery in it?

[@themrhelperguy]

Need a new one.

[@offtheheezayfilms]

Hi, can you help me I have a mercury thermostat same brand and model and the temp seems real off like I’ll put it on 70 and just starts to warm , what should I do?

[@themrhelperguy]

A good start would be to make sure your thermestat is level and secured to the wall.

[@pi1810]

I LOVE the close-up video! Thank you!

[@brittanymanzanares1828]

How can I get this thermostat to turn on at a different number?

[@themrhelperguy]

Play with the level of the thermostat. I saw one operating in a garage that kept the temperature around 40 degrees.

[@alextaft6838]

Hello- I enjoy your informative KZbin Videos. You have a gift and thanks for sharing. I have recently purchased on EBAY a Honeywell T87F round thermostat with mercury switch. This is a heat and cooling thermostat. All works well with this thermostat except that the lower room temperature needle and the upper temperature select needle do not correspond to the actual room temperature. The actual room temperature taken independently with a indoor thermostat reads 4 degrees higher than what s given on the Honeywell Round T87F thermostat. I have only used heat for this thermostat as it is a recently purchased and installed unit. Any suggestions or videos how to calibrate the correct temperatures? Thank you for your attention to my inquiry. Please and thanks, Alex Taft, Springfield, Illinois

[@MsFUs1]

Your videos have been so helpful to me

[@themrhelperguy]

That's nice to hear.

[@craigt3604]

Awesome. You just saved me a weeks worth of craziness. Thanks for explaining that anticipator.

[@jimsteele7108]

Hey, thanks a lot for your help. I understood you just fine, sorry for the negative comments.

[@themrhelperguy]

comments happen

[@jimsteele7108]

themrhelperguy, yeah, they sure do.

[@citygriller]

Thank you for your work it helped me fix my heater

[@shonpe2392]

Thanks so much. Trying to figure this out forever. You're the man! Great video, great explanation.

[@orangeballoflight]

Awesome video! Thanks for the help!

[@themrhelperguy]

:)

[@2000xlt]

what is the recommended manufacturer setting for this thermostat heat anticipator settings

[@themrhelperguy]

The anticipater setting is based off of the gas valve. There is a procedure to find this.

[@HeavyMIGGY]

Thanks brother this helped! Hope you’re doing well!

[@themrhelperguy]

hanging in there

[@Kirby7601]

is it ok to touch the bulb?

[@themrhelperguy]

+KirbyVGCP if you want to. Sometimes they need cleaned

[@RaZorblade_SunshiNe]

@@themrhelperguy Mine needs to be cleaned.Can I use a dry old toothbrush or rag.Is there a special way to do it? Thanks

[@eulaliorodriguez5325]

Thank you for sharing this video.

[@marcusbailey1048]

Your video did help me figure out why my furnace kept going on n off. Thanks.

[@themrhelperguy]

Marcus Bailey great

[@themrhelperguy]

themrhelperguy let me guess heat anticipator

[@missmaya1977]

I’m really hoping this helps me!!! My bill went up 57% in one month!

[@miamor600]

Thanks my guy you save my life Great great help !!!!!!I live you bro!!

[@multitoolish]

Great video!! Lots of useful information!

[@themrhelperguy]

multitoolish I have seen so many people blame furnace problems on their thermostats. But the stat either mercury or electronic are simple to test by jumping out the wires.

[@hollygolightly9072]

reporting you as someone obviously unbalanced and is trolling this site.

[@wcomley]

Thanks for the help! Really appreciated.

[@themrhelperguy]

Always glad to help.

[@awkward-to-awesome9904]

My stat is set to 72 right now. And is saying it's 65 lol.

[@samuelstephenadkins]

This video fails to which way to rotate the total housing so the the temperature reached as measured is the same as the setting on the dial!

[@themrhelperguy]

S. Steve Adkins you can play around with rotating the ts to match the temperature readings. But getting a good thermometer and comparing it with the temp setting will tell you how many degrees you are off so you can compensate. They also made a very little used tool to adjust the mercury bulb. But the best way is to ignore the bottom reading and have a thermometer in the rooms that the thermostat serves and adjust the thermostat accordingly. You may have the thing set at 70 in the hallway and it heats the rooms to 74. If that is the case you could set the stat to 66 to keep the rooms at 70.

[@doitperfect9420]

I understand him clearly.

[@nallwdrgn]

Thank you!!

[@thejazzmonastery9541]

wow. It would drive me crazy to have a conversation with this guy.

[@themrhelperguy]

Cant be that bad. You watched another video.

[@tabbicat42]

Thank you so much! This was a lifesaver ❤

[@MAD20248]

thank you so much

[@joe964]

Thank you

[@damapurr]

Thank you so much! You did great! (: easy to understand!

[@themrhelperguy]

+Danielle Purcell glad to help

[@michaelp5378]

Thanks guy!!!

[@NanBeno60]

Can someone help me understand please, I tried to wear my headphones but I just can't understand, not tryna be rude

[@reverseperistalisis]

two thumbs up TMHG!!!

[@billdakelski]

Don't remove the mercury thermostats, they are far superior to what is made today, and left in place are not an environmental problem. They require no batteries and unlike modern thermostats almost never break and will not shut down your system in the middle of winter when you are on vacation because of a weak battery, causing your pipes to freeze and flood the place. (happened to me) The energy savings from a electronic thermostat is greatly overrated to in fact in my actual real life studies, I can detect almost no difference. As a landlord, I used to replace mercury thermostats routinely, However, after spending over a thousand dollars in cost of replacements, troubleshooting, parts and labor for techs to troubleshoot Hvac units only to discover malfunctioning electronic thermostats, I reinstalled the old mercury ones that i had on hand, and they just keep functioning decade after decade. Finally, there is no programing required which is time consuming to have to keep reprogramming them constantly for various reasons.

[@pi1810]

That is good to know !

[@supradrifttv]

Yah except for older worn out units, or unmaintained ones stuffed with cat hair that are wayyyy off

[@2335467]

I can't understand you.

[@themrhelperguy]

+2335467 not even just a lttle

[@14brimason]

2335467 sounds like he got marbles in his mouth I can't either

[@caseykittel]

The gentleman doing the video probably has a physical condition that makes it harder to speak. I appreciate his help. I appreciate him not being so self conscious that he takes the video down.

[@royvaldez2393]

Thank you very much 😊. You help me out. I can understand you 100%. Dont pay attention to negative sour people. 😊

[@2335467]

@@royvaldez2393 I still can't understand you.

[@maxkritikos8485]

Why does man’s talk like he got marbles in his mouth

[@themrhelperguy]

Im a fighter.

[@flashjosh908]

your voice! how can anyone understand it

[@themrhelperguy]

+Joshua Ramsey I'm not sure but they do

[@tonylocks28]

😆🤣😂

[@trevorviguilla32]

Playback 2.0 please!

[@themrhelperguy]

What does that mean?

[@MikeM-pk6zq]

Useless

[@worldwidehf]

wtf is he saying?? is this a joke??

[@themrhelperguy]

This is not a joke.

[@ClosedLoopMusic]

what is up with your voice??

[@themrhelperguy]

What isn't up with my voice!

[@keithodonald9877]

Tryin to understand how it works but his voice was so garbled it was irritating trying to understand him

[@SillyGoose2024]

dude i cant understand a fucking word youre saying

[@danrowe79]

Can't understand you. Speak clearly please or add subtitles.....yikes.....

[@endymioneyes6362]

I can't understand you either

[@themrhelperguy]

I could try to redo this video. My voice is a little better but not much.

[@themrhelperguy]

I could also try captions.

[@vimabete1]

nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia nia

[@richardhall9815]

Why does it sound like this guy has no teeth

[@themrhelperguy]

+Richard Hall I'm only missing my upper right teeth. On my channel page is my old voice on the main video

[@pennybrown3043]

+Richard Hall It doesn't sound like he is missing his teeth it sounds like he has his mouth packed full of gauze.

[@Holyghost089]

I’m trying to turn off the heat. I’m turning the dial all the way to the left, and it doesn’t seem to be doing anything. The weather is really warm right now where I live and the temperature on the unit says it’s over 80. If you can help I’d really appreciate it.

[@themrhelperguy]

Shut off the power to the unit. That will give you a break and a chance to regroup.

[@alextaft6838]

Hello- I enjoy your informative KZbin Videos. You have a gift and thanks for sharing. I have recently purchased on EBAY a Honeywell T87F round thermostat with mercury switch. This is a heat and cooling thermostat. All works well with this thermostat except that the lower room temperature needle and the upper temperature select needle do not correspond to the actual room temperature. The actual room temperature taken independently with a indoor thermostat reads 4 degrees higher than what s given on the Honeywell Round T87F thermostat. I have only used heat for this thermostat as it is a recently purchased and installed unit. Any suggestions or videos how to calibrate the correct temperatures? Thank you for your attention to my inquiry. Please and thanks, Alex Taft, Springfield, Illinois

[@themrhelperguy]

This is a common issue with these thermostats. The bottom thermometer is not very accurate and has no function in controlling your furnace. If it says it's 58 and you have the top set at 75 the furnace is not coming on you know you got a problem. I have a 10 dollar digital thermometer that is very accurate. I use this to monitor the temp in the room. Also keep in mind these thermostats are the best even with that lower thermometer not being to accurate. Make sure the thermostat is level confirm the temp with a digital thermometer and let it run.

[@themrhelperguy]

Every dollar counts.

[@alextaft6838]

@@themrhelperguy Mr. Themrhelpguy- thanks for your immediate response. I like this round thermostat (Honeywell T87F) because this thermostat is located in our bedroom and electronic thermostats create a clicking noise when operating on and off. Hard to sleep with clicking noise. The electronic thermostats click when giving the furnace the instruction to fire up and clicks when shutting off. Anyhow, the mercury switch has no clicking sounds. Nice. So I am able to sleep when the cycles and demands of the furnace are many during the frigid days of January here in Central Illinois. I will take your advise and purchase a digital indoor thermometer to get the correct room temperature reading. Thanks again for sharing your knowledge expert. You ROCK. Cheers! Alex Taft