Say Goodbye to Mercury Thermostats : "The Digital Revolution of home Comfort Has Arrive"

[@firebearva]

Thank you Dave, I am in Tampa it is 3:30 am and I got up feeling warm only to discover I had no display on my Honeywell controller. Mind you it is July 2nd in Florida, we are talking sauna! I watched you connect the wiring to bypass the use of a thermostat, so I did that and I got the unit to start on the cool cycle. This has bought me time to go and buy a new controller in the morning and to get back to sleep.

[@CtS1546CtS]

The few videos I've watched that you've done have truly been tremendously helpful!

[@VeryPersian]

It's great to see people like you who are so passionate about their career.

[@outdoorjanitor]

My hope is that a digital unit will not let temp fluctuate so much: seems like w/ vertical Mercury it gets pretty cold before heat turns on & pretty hot before turning off which makes for putting on & taking off blankets & poor sleep all night. Further, we use a fireplace which is close to the living room thermostat; so as brick cools overnite, thermostat tries harder & harder to heat the living room until bedrooms are sweltering: now that last kid moved away this summer I'll use this to staple wire between old thermostat's location and our bedroom because in the final analysis all we CARE about is our bedroom now: IT can control the house temp: hey, they must call it a "MASTER bdrm " for a reason. Luckily in our house, only A/C & gas heat, no resistance heating backup or coils, or electric strip, in our house so prolly won't have to figure out some of the finer points. Thanks! Sounds like you have a good heart toward your customers, sir, God bless, Merry Christmas!

[@rb67mustang]

Thank you very much, David. I have an old house with forced hot water heat and a couple old Outdoor AC Units. Heat to my upstairs zone failed in January 2024. I thought I had a bad zone valve power head. I manually opened the valve and I made it through the winter. Fast forward, I just installed a new power head and the upstairs isn't calling for heat. I think I may have had a bad thermostat. it's old, and I just discovered its a mercury thermostat. Possibly dust has effected it. I'll clean it, but it's best to replace it with a new digital unit. Thanks again!!!

[@robertmontgomery3892]

I'm replacing a vintage thermostat with a Sensi Emerson Thermostat. I've watched all kinds of youtube videos that address swapping out and replacing the old thermostat and I must say this is one of the best for folks with older thermostats. I took the cover off of my thermostat and I still don't see the wires that correspond to R B W Y that I would expect to see so I'm guessing that I actually have to remove it from t he wall and flip it over to see where the various wires connect. Does that sound right or am I missing something? BTW this thermostat is in a mobile home which dates back to the early 1970s. I know that if I call out a service technician to do this it will probably cost me $150 and I don't have that kind of money. I'm 76 years old and want to try and do it myself.

[@lyubolesiv6867]

Wow!!!! Five stars to you and your channel! I wish you lived out by me! I’d call you to service my unit anytime of the week. I respect you honest and loyalty so much! Blessing to you and your business sir!

[@nonyabnss]

THANK YOU , THANK YOU!!!! I had a green wire and a red one for the same set up you've shown here. You explained it so well and so clearly. I replaced it and is running nicely! Your video was so helpful.

[@erichubbard2217]

Thanks for this video but I'd like to ask you the landlord previously used a wiring with only a red/white wire I have a Honeywell CT87N and the heat won't shut off from the thermostat what could be wrong?

[@ALex-yv8xw]

Put the white to the yellow..... I just experienced the same issue.... I miss a old school Honeywell

[@song1861]

Hi David, My old Thermostat only have 2 wires (Yellow/Green) The wire was Yellow on R and Green on W for the old thermostat. My old thermostats look like 2:30

[@adelliaharuno]

Most helpful thing I've seen online. Thank you.

[@boggamer-tt8tp]

Dude's giving hypothetical reasons why someone might want to change. He's explaining extremely thoroughly how to do that. If you feel the need to defend your knowledge in the comments of a youtube video... you probably are short enough to need the soapbox. Thank you David Jones person for making this incredibly useful video.

[@jddr.jkindle9708]

Very good video. I removed from service an "old school" White-Rogers mercury bulb thermostat two weeks ago.

[@tracyr5594]

good video, wish it was higher resolution.

[@HobbyOrganist]

Great video! the 50 downvotes must be from 50 competitors angry that someone spent a lot of time and effort making a video to teach homeowners how to do a simple once explained repair instead of paying a couple hundred bucks to a "professional" to hook up a few color coded wires in 10 minutes!

[@guitarTennisCarHomeFixFlying]

Great video! You have a great mechanical aptitude!

[@blueticecho5690]

Safer..how much land fill space used with those batteries..

[@peterj.haskett6994]

Hello and thanks for the videos. I am replacing an old mercury based Dayton thermostat with a White Rodgers 1F78. It appears the wiring scheme is unorthodox for this old thermostat but it worked perfectly, I just wanted to convert to digital. Anyway, the blue wire was connected to R5, White wire to Y6 and Red wire to W4. I am trying to figure out which ports are equivalent on the 1F78 because it seems to simply stay on. I have heat only; a Weil-McLain boiler

[@SherryVictoria]

david, two questions: If the old mercury has to go to 85 to crank up even to 60, is it hopeless? And also, how do you adjust the bottom dial (room temp) on the old mercury? One last day before I have to replace with a round Honeywell no mercury. Both of my wires seem to be white...

[@Homestead414]

I only have a black and white wire and replacing thermostat should I replace wire furnace is just heat.

[@dbbbarney]

I live in Phoenix, have the old round Honeywell t-stat. Want to replace with my digital touch screen Honeywell. The old t-stat has red to r, green to g, what appears to be blue to O, white to w and yellow to y however w&y are jumped/connected. Confused as to why it is set up this way and wonder how to set up my digital

[@ColdBlue-69]

I am trying to install a Honeywell programmable thermostat and there are only 3 wires coming out of the wall. The white wire has been spliced to a green and a yellow wire. Can you help?

[@stevencohn5434]

Help - my current wiring is R,G,B,W,O and Y. I want to replace this old round Honeywell thermostat with a programmable one. I have two zones forced hot air (oil and central ac) My other thermostat is wired as RWY. Any suggestions.

[@ray.c6288]

Hello, i got some trouble about my thermostat wire, I don’t know if you can help, there color are different from many normal wire, they are only 4 colors, black, blue, green, and red, i would to install to nest thermostat, thank you 🙏

[@kevinkelleher5213]

I would like to replace 3 Automag Mercury thermostats with 3 basic digital Emerson thermostats. The boiler is a brunham heat only furnace with 3 separate zones and valves. The current Automag mercury thermostats have 3 wires and are connected w-w, r-r and g-b. I have not been able to find any information on how to hook those 3 wires to 3 basic non programable digital Emerson thermostats. Any help would be appreciated.

[@kristiparnell678]

There is no white wire coming out of my wall. I have a black, green, yellow, and red. Not sure where the black is supposed to go. Any ideas?

[@clydehamilton8056]

Good Tutorial. I have a motor home with furnace only. AC is separate. The old thermostat has two wires. One is white and one is red. I put white on the W terminal and red on the R terminal and nothing. Any suggestions would be appreciated.

[@mistarichdontplay4795]

Can an old mercury thermostat be used on a 6 wire set up! Another words thiers 6 wires coming out of wall. I just got a house. It has a Goodman furnace and some kind of electric heat pump outside for A/C It actually has an old style fuse instead of breaker on side of house. I'm gonna test the hot wire with my volt meter. Are you in Alabama

[@kalarora]

You are awesome 👌 Knowledgeable and honest

[@harveyedwards7870]

I have HONEYWELL T8195B-1009 thermostat and want to replace it with a digital. I have two thermostats on my system. Any recommendations ?

[@cthuhlumadness7621]

i really appreciate you making this video and wanted some advice if you can pass it down. Im trying to upgrade my mothers thermostat to a modern one and found that her White Ridge 1f56w-444 wiring does not have a yellow wire. I took a picture of the original wiring before i took everything off and copied the picture to reinstall the thermostat. It does not turn on anymore. Ive tried to fix it and looked over the original manual but to no avail. I did your test tying the red green and white wire together and the system did not turn on. Any advice you can give me to get her ac unit back up and running again. Were down in Texas and its getting hot.

[@mib2015]

What if I have an old thermostat for only ac and only 3 wires?????????

[@marklenarcic2741]

I didn't take note of the wires connected to my old thermostat. Now I have a red, white, green and BLACK wire. I assume that red goes on R, green goes on G and white goes on W. I don't know where the black wire goes (I had assumed that it was all self explanatory). Any suggestions how I can get my air cond working?

[@rickirvine5758]

But what about a simple two wire bulb type? I only have two wires, bulb opens when temperature is reached, and closes when it gets cold. On the old existing thermo stat I only have two terminals, it is not on a heat pump and doesn’t have any of the numbered terminals you show but of course the new t’stat has those terminals and requires batteries to run. All the t’stat does is close a contact and applies 24 volt Ac to a solenoid.

[@notch352]

Ok. I only have 2 wires coming out of my wall and want to install a digital wifi thermostat. How the hell am I gonna do this?

[@chrisosorio6947]

Did you figure it out?

[@stevendawson1488]

Hello, great video but I have a question. I have a digital thermostat for my a/c and a round Mercury thermostat for heat. I want to put the heat in the digital thermostat. Now my heat is a boiler with hot water base board heat. Can I hope this up to the digital

[@rtel123]

The old mercury were the best thing. "less moving parts???' A bimetal strip and a dial! Inefficient?? Anything that turns on the furnace when it is too cold and turns it off when the temp is good, is completely efficient. They last virtually forever; the reason they use mercury is because a mercury contact never fails. The new ones need constant power. If you cannot add a third wire in the wall, you have to use a battery... It works hard to hold a relay the whole time your furnace is running. It will fail on the coldest day of the year, when you have no spare batteries. And they go out of calibration much more often than the mercury design, except you cannot recalibrate them like the mercury type.

[@Susan70003]

Anyway to refurbish the old dusty merc honeywell and put it back on?

[@kijahne1210]

Afternoon David, I hope you can help me. My issue is I currently have a mercury thermostat for the cooling unit in my home (the heat is controlled by another thermostat downstairs). The mercury thermostat only has (3) wires connected to it. (yellow, green & red). I hooked the (3) existing wires up to the new Honeywell Lyric T-5, and no response. It says that I need a “common”. At the cooling unit in the attack there are only the (3) wires connected (same color) what should I do? Am I able to upgrade my thermostat with only the 3 wires? Please advise if you can.

[@billdakelski]

So just dust the coils off if they are not as accurate as you need., Don't remove the mercury thermostats, they are far superior to what is made today, and left in place are not an environmental problem the mercury is incased in glass and cannot go anyhere. “an estimated 310,000 mercury thermostats are disposed of every year just in New York, but only slightly more than 1 percent of those are recycled. The vast majority of them are being dumped into our enveronment and each one contains approx 2.8 grams of mercury which can poison about 150 million gallons of water each. ”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.

[@HobbyOrganist]

I'm an advocate of keeping those working round thermostats, and not all are thrown away- plenty are for sale on Ebay, almost nothing goes bad on them because the mercury switch is mercury sealed in a glass tube that makes the electrical contact. Sometimes the little fine wire coil will burn out if someone shorts a wire, but these were well made units. The new digital units all have electronics that will fail, all made in China- the land of toxic drywall, poisoned pet food and leaded painted children's toys, so I would suggest KEEPING the old working round thermostat in a drawer as a spare for the day the digital one fails, then you can in 10 minutes simply swop them out and have heat/A/C while you wait on getting a replacement, that's what I'm going to do. The mercury is totally harmless in the sealed glass tube, and anyway, it comes out of the ground in the first place, so dumping it in the landfill simply returns it from where it came in the first place.

[@SherryVictoria]

billdakelski: I wish! but my mercury has to crank to 85 to even get up to 60 degrees. And the bottom temp doesn't seem to do or read anything. I did dust off everything. How could I adjust the bottom part? And seems to only have two white wires, which if I have to, will replace with the round honeywell no mercury. NOT my choice, but we are dipping into the 20s last week, and it's only September. Help? How do you guys know you have a comment to reply to???

[@Susan70003]

@@SherryVictoria how did you clean the dust off? I want too clean mine up also.

[@patrapper7367]

I have the Honeywell t87f and when I took it off I only see two wires a red and a white is that all I need to hook up to my new electronic thermostat which is a Honeywell home rth2300b thermostat? I have this thermostat for my oil baseboard heat

[@charliejomocan2491]

Hi David, I am planning to replace my old thermostat to digital, but I am confuse of the wiring. There is a line voltage (Off-High-Medium-Low) and low voltage (Numeric Dial) wiring that connects to my old thermostat. Need help please.

[@takeachanceonme4]

All your videos are great. Thank you for making and posting them.

[@andystitt3887]

is it more efficient to turn the heat down when not needed or keep the same temperature?

[@4Baileymom]

Question: I have an old Honeywell round thermostat (Mercury) with a Heat/cool switch and a fan switch that has 2 positions, On and Auto. How is the fan energized when on Auto. Is it an internal function of the thermostat (Green wire energized when the thermostat calls for heat) or is it some kind of function of the furnace.

[@eulaliorodriguez5325]

Thank you for sharing this video.

[@billiambarnett]

Great video! I have a boiler only unit. Trying to switch from mercury to digital. It’s a three wire system but on the White Rogers valve assembly in my basement there are only numbers associated with each connection. I have a hard time trying to find a wiring diagram then why tell me which wire goes where. Any insight?

[@JackSmith-ud9bg]

thanks, I'll try the thermostat. I changed the relay, capacitor and the control board. When I push the in the contact or the fan runs and the compressor runs. In heat mode or cooling mode the heat pump won't start. Could you give me any ideas what to do? One other thing the reversing valve coil clicks but the whips have sound is not happening.

[@CryptidWalks]

What if my mercury thermostat has only two wires?

[@keithhoward8651]

Great job David 👍🏻

[@o0bluemilk0o]

THANK YOU for this! It was incredibly helpful.

[@jayfinesse7231]

Can you please help me??? I have an old round mercury thermostat that I want to replace with a Sensi. I have central AC and my heat is baseboard hot water recirculating pipes. I have two sets of wires coming into my thermostat. The first set are red and white. Red going to the R terminal on the thermostat and White going to the W. The second set of wires have red, white, and blue. The red going to the B terminal, white going to Y, and the blue going to G. There is also a jumper wire connecting the R and B terminals in addition to the wires going there. Everything works fine as is but wife wants digital. In the sensi app, when I put in the letters for the terminals I have wires going to it tells me it’s no a valid configuration. Please help! Thanks!

[@ny1084]

My home has old cloth “potentially asbestos wiring”. I was actually looking to upgrade my digital thermostat to a smart thermostat however the wiring in my house only have 2 wires. They are also wrapped in “asbestos”. Are there any videos on how to handle this?

[@papoloco34]

Great video David👍👍👍

[@MrLambo_44]

Energizing on cool?

[@kittenblevins4685]

I have a universal parts thermostat heat will not work on auto but on fan what CLD be the problem

[@krams1015]

Help! My old thermostat has a blue wire that goes from W to A?

[@jchavez7522]

How do I know if I have a heat pump ?

[@tecno57]

I have a LUXPRO PSDO1OBF non-programmable heat only,with fan. Trying to install it to a baseboard heating. I am ??? Not to sure I have the right thermostat.

[@princessmama10]

Hi David, i have a question. I have 3 wires coming out of my wall and only my black wire is marked green and red is red on my mercury thermostat..... wired it like i saw it on my new digital thermostat and now all it does, is tell mw the temp and wont turn my heat up or down. (My a/c is controlled by qnother mercury thermostat on another wall). I matched it like you said but i still have to control the heat from the furnace its self. I have water heated floorboards.

[@tothepointvids5192]

SirThe thermostat in my condo has only 3 wiresHeatCoolCommonIt control old McQuay fan coilI need to replace it with a non-programmable digital thermostat But they have so many port (Y, W, O, R, etc.)Can you just name one model for my case that’s easy to install?Thank you

[@earelevant]

Does this work with a boiler/ radiant heat?

[@twincam825]

Thanks for the info will clean my mercury bulb thermostat.

[@pierredelafrance4962]

If you program your new programmable digital thermostat to 65degrees when you are not home for ten hours a day Monday thru Friday then 74 degrees when your home.If you use an old thermostat latched on 74 degrees all the time costs more money to operate.

[@HobbyOrganist]

74 degrees?? so if you 65 to 74 degrees, everything int he house cools down to 65 degrees- the walls, floors, furniture etc etc and then that mass all has to be heated back up again which can take a few hours of the furnace running more to do it. That's not saving much, and that kind of temperature with it's inherent humidity changes up and down like that is not good for wood floors, furniture etc.

[@mikelewis9340]

This was excellent. Helped out alot

[@everythinghomerepair1747]

Great job explaining this!

[@kensiwells1094]

My only suggestion is that you do an actual “how to” video and have someone film you as you replace one and just do a voice over explaining what your doing at the time. But this was very helpful thanks!

[@thomashumphrey7444]

I have a mercury 1620 30V that I want to change out with a digital... my trane xl 2100 is a furnace and has only 4 wires going to it..... i did not mark the wires and I don’t have a wrench to see what the wires are plugged in.... I guess I will have to get a wrench won’t I??? Haha.... does any body know already the four wire red blue green white......

[@MaximRecoil]

How could a different thermostat possibly save you any money at all on heating or cooling costs, let alone $200 a year? All it is, is an on/off switch. It's going to take the same amount of fuel to heat a house from e.g., 65 degrees to 70 degrees, regardless of what you are using for a switch to turn the furnace on when it reaches 65 degrees and turn it off when it reaches 70 degrees. If you're claiming that a digital thermostat is more accurate and accuracy translates to savings, then that's false. If an old thermostat causes the furnace to heat the house to say, 72 degrees when you only wanted it to heat to 70 degrees, then it will be that much longer before the furnace has to come on again; it evens out. Furthermore, the old style of thermostat is nothing more than a mercury switch (which is just a glass bulb with metal contacts on each end, and a pool of mercury in the middle) on the end of a coiled bimetallic strip. Mercury switches don't wear out or otherwise fail; bimetallic strips don't wear out or otherwise fail, which means, those old thermostats don't wear out or otherwise fail. On the other hand, all microchip-based electronics (digital thermostats) are prone to failure. There's been a White-Rodgers rectangular thermostat in my house since about 1971, and it's never had an issue (obviously; there's nothing that can go wrong with them). I'd never even cleaned it until tonight. Out of curiosity, I took the front off it and there was decades' worth of dust bunnies in there, but due to the design, very little dust was on the coiled bimetallic strip. There was a small spot of dust on top of it just under the mercury switch, not enough to cause any significant insulating effect. The thermostat manufacturers must be desperate to sell new thermostats (which, like many new products, are a downgrade compared to old products). They know the old ones never wear out or otherwise fail under normal conditions, so first, they play the comical "MERCURY IS SCARY!" card (as if the mercury is going to magically teleport out of its glass bulb), then they spin a yarn about energy savings.

[@pneudmatic]

You can't program a mercury thermostat. Digital ones can be programmed to reduce the temperature when you're sleeping or away. Because people don't want to get home/wake up to a cold house, they won't just turn down a standard thermostat (and people have better things to think about).

[@HobbyOrganist]

Turning the heat down while you are gone for NINE HOURS a day at work does save some money, because it takes less gas/electric to maintain 65 v/s 70 for 8 of those 9 hours, and the furnace will quickly raise the temp back to 70 when set to do it a half hour before you get home. OTH if you are retired and at home all day, a programmable unit is probaably not worth it or saves any money- stick with the old mercury one and manually turn it down at night then. www.thermostatcenter.com/how-much-they-save/

[@MaximRecoil]

@@HobbyOrganist You can turn it down yourself before you go to work or bed, and turn it up yourself when you get home or wake up. That will actually save you more money than setting a programmable one to turn on a half hour before you get home or wake up, obviously. The idea that a simple switch, in and of itself, can save you money is absurd. How you use the switch can save you money (the same goes for a light switch, for example). I already posted a similar reply to "pneudmatic", and apparently David Jones deleted it, so he'll probably delete this too. I guess he doesn't like facts/logic interfering with the false claims he uses to sell products.

[@ytjbet]

It's the software. For example, compare a 98% efficient furnace to much older one. The new one has strategies to maximize heat and minimize cost. Thermostats are similar, they can ramp up or down economically.

[@MaximRecoil]

@@HobbyOrganist "Turning the heat down while you are gone for NINE HOURS a day at work does save some money" You can do that with any thermostat. " and the furnace will quickly raise the temp back to 70 when set to do it a half hour before you get home." That would cost you more than doing it manually, because it would be at 70 for a half hour longer each day.

[@maryfelice56]

Thank you, your presentation was most helpful!

[@jdirosa1]

Hey David, here’s my problem as brief as I can make it. Thermostat went blank, put new batteries in and it came on. Problem is that it does not turn anything on. So I followed your instructions and connected all the colored variations together and nothing comes on. I checked the transformer and both high and low sides seem to be good on both sides. So now I went pc board where the relay is located. Having trouble testing the no and nc terminals on it but it does not click when I put the breaker on and adjust thermostat . Could this board with the relay be bad or is there anything I should check on the outside condenser , could I be low on Freon . It is a unit with heat pump and emergency electric heat that I switch to manually on the thermostat.

[@TheBigBentley911]

Joe Dirosa Did you check for corrosion on any of the contacts where the faceplate pins connect to the terminals mounted on the wall? I had this same issue and just had to scrape off some corrosion that had built up over a decade or so.

[@jdirosa1]

LonelySquad I had put a new one in, I think it’s the board

[@mcw0530]

Funny. I’m a tech guy at a big computer company and I rip out these smart thermostats and go out of my way to install mercury thermostats.

[@Susan70003]

Is there a way to refurbish my old dusty honeywell? They're not making the mercury ones anymore.

[@sabreenamohr330]

I truly appreciate this video. Thank you kindly sir!!

[@buddytroost1262]

Old junk i update one with honeywell round digital mutch better now i have a new boiler and now with round modulation from honeywell love it ^^

[@forest1034]

Thank you!! Great video!

[@PaulCTownsend]

Good Job

[@everythinghomerepair1747]

Less moving parts but they last 1/10 as long as a good old reliable mercury thermostat.

[@Jjonathanhart]

Well I've only got 2 wires, red and white.

[@55cperez]

Good job, very helpful. Thank you

[@bluecollarmillionaire4life]

thank you

[@CL-ty6wp]

They are good little trained consumers is why they 'upgrade'.

[@theonemodifier]

RC?

[@Alienspecies635]

theonemodifier red cool its the ac wiring if its on 2 different relays

[@Alienspecies635]

typically rc and rh are jumped out

[@mattwiens123]

rc - red to cooling rh - red to heat

[@tcyk]

Good stuff.

[@warning4664]

I collect different types of mercury switches make things out of it

[@Susan70003]

Isn't there a way to clean off the dust from my round mercury honeywell thermostat to get it back to being accurate?

[@johnadams2904]

Great job thanks

[@AndrewJW]

Thank you

[@jeffjenkins8878]

Good info

[@victoza9232]

I have two old Honeywell mercury thermostats and one new Honeywell digital (T-87) in my house. The old mercury ones are MUCH more accurate and work better than the digital. The Honeywell digital T-87 is garbage. Because it's digital, it's an all-or-nothing propostion. Either it's on or it's off -- there's no in-between that you'd get with an analog like the mercury thermostats.

[@chadcaughmann7898]

I’m confused...what are you saying about digital being all or nothing because it’s on or off. I have a mercury thermostat, and that’s exactly how I’d describe it - it’s on or off. I set the temp, and it runs until it gets to the temp...then it turns off. So how is that any different?

[@victoza9232]

@@chadcaughmann7898 If I turned my digital thermostat down even one degree, say from 70 degrees to 69 degrees, it would shut the heat off completely, rather than lowering the heat to 69 degrees. Also, there was always a 4 or 5 degree differential between what I set the thermostat to and what the actual temp would be. The Honeywell digital T87 is a piece of crap. Apparently, I'm not the only one who feels this way. Read the reviews on Amazon. One reviewer's thermostat was off by 10 degrees. I recently installed a brand new "old" Honeywell mercury thermostat like the other two that I have, and it works beautifully. Whatever I adjust the dial to, that's how warm the house becomes.There is no differential. What a concept, huh?

[@Susan70003]

@@victoza9232 do you have a link for where you bought yours from?

[@aliomar-bn6nn]

david jones thank you nice

[@eyeeye00]

Your a beautiful soul. Thank you.

[@bluecollarmillionaire4life]

thank you

[@jojo-cy1bq]

I will tell you since PSEG changed my mercury thermostat to modern one it never worked good more than 5 to ten degrees inacurate

[@michaeljavert4635]

I just spent a lot of money on E-bay for a mercury thermostat. I am going the other way and getting rid of this digital rubbish. Was hoping to see how exactly it was mounted, as I ran into a snafu. I am sick of this digital garbage when the old stuff got the job done, without batteries, and was more precise. I like mechanical knobs and switches that respond to me, not to a computer chip that detects something. I get that with the vintage, round Honeywell Thermostat with mercury switches. And this bunk about mercury being poisonous is B.S. Unless you swallow it, it is not a problem. And in a thermostat, it is sealed in a glass vial that is highly unlikely to leak or break. I live in a country that bans things adhawk because they think its dangerous. Meanwhile, alcohol, tobacco, and firearms are flying off the shelves and stockpiled by nut jobs, and no one says a word. Our food is poisoned with cancer causing ingredients from fertilizers to pesticides, causing the cancer, and health crises of diseases, illnesses, and deaths, and NO ONE says a word, but BY GOD, we MUST ban mercury thermometers, thermostats and chemistry kits, because some stupid kid poisoned themselves by drinking it. Totally ridiculous !

[@andrewbethea327]

Here is some advice to all those who plan to replace their old mechanical thermostats: rather than dispose of them, have them resold somehow. Or perhaps donate them. My aunt and her husband gave me their old mechanical thermostat (which I prefer over a digital one), and I plan to use it.

[@oldbearhair2423]

Thank you Kindly

[@jimbola77]

thank you sir!!!!

[@naeemmaqboolmaqboolmasih73]

nice informitio

[@jaypeterson8747]

My mistake was the white wire turned yellow from 50 years of cigarette smoke 😂

[@RedsoxVenom]

Look I like the content... but did you really upload a 240p video in 2017....come on now.

[@PolkCountyWIProgressive]

Lol my current thermostat has two black wires…no labels

[@Vscounter]

Jeez 240p, but it was helpful.

[@erics9487]

Think I'm more confused now than I was. Lol

[@joannpadia]

Too confusing with the different brands

[@DAS-Videos]

He made it very confusing. And you can't just go by the color of the wires. You have to see what the wires are connected to on the heater or AC. And tying all the wires together is a terrible idea. Why power the AC and the heat at the same time.