Any HVAC techs???

[Chefwheredyougo]

I bought a Google nest thermostat and need some help identifying some wiring! Any help would be greatly appreciated

 

[Mrtakeoff53]

My FIL bought one and had to return it because his house wiring didn’t match the nest wiring capabilities. What wires are in your house? FYI, I am a DYI homeowner and NOT a licensed HVAC contractor.

 

[Chefwheredyougo]

I checked compatibility before I got it, everything checked out fine. I'm just confused on the wiring from my old thermostat, theres multiple codes for all 6 of the wires, which makes it complicated figuring out which wire goes where on the nest. The app is intuitive, but doesn't necessarily make figuring out the coding easy.

 

[Mrtakeoff53]

If you can, check the circuit board on the HVAC unit and see where the wires actually go to. It’ll help you install it properly to the nest.

 

[Chefwheredyougo]

I'll have a look thanks

 

[Dr. Dendrostein]

I bought a Google nest thermostat and need some help identifying some wiring! Any help would be greatly appreciated

If you continue have issues, call tech support, have brand of ac & furnace, model #s , serial #s,ready. It may take a long while before pick up phone on their end. Before virus, took me, my techs, up to 1 1/2 hr wait. Before they pick up. Bummer.

 

[Sailingeric]

post a picture of your wiring. I have a Nest and I had some confusion on where one of the wires was suppose to go but found the answer on line

 

[Dr. Dendrostein]

Did you write down wires on old t-state or pictures of it. Ex. Thermostat wire red to r on sub base. Yellow to y on sub...etc

 

[Crabs McJones]

I just installed one a few months ago. I'll try to help as best I can. Do you have a pic of the previous wiring?

 

[Chefwheredyougo]

It's an older programmable unit. Early 2000s carrier

 

[Chefwheredyougo]

I guess its 7 including the "C" (black)

 

[Crabs McJones]

Any chance you can lift up the wires so I can see the labels underneath?

 

[Chefwheredyougo]

I installed it yesterday, but when going through the tests, the heating tests would only push cold air. Left them running the tests for 30 minutes, they'd stop then I'd start the test again. Hot air never came out. When the AC test came it would push cold air and continue to, whether it had reached the set temp or not. I changed the heater pump setting from O to B thinking that could be the issue, and the air was warmer, but not heated. After about 6 hours of tinkering between the thermostat, the app, and online searching I gave up and just hooked the old thermostat back up.

 

[Chefwheredyougo]

Sure thing. The app said to use the first row of letters.

 

[Chefwheredyougo]

Brown wire is Y1/W2

 

[Sailingeric]

Do you have gas or electric heat? You have to tell which one you have, I had the same problem to start with, it would not fire the heat since I had it set to electric and not gas.

This look like what you might need, unless you did that already

https://diy.stackexchange.com/questions/164935/weathertron-xl1200-to-nest-thermostat

 

[Crabs McJones]

Last question and i'll start doing some reasearch, whats the make and model of your furnace

 

[Chefwheredyougo]

Sorry, its 100% electric

 

[Chefwheredyougo]

Do you have gas or electric heat? You have to tell which one you have, I had the same problem to start with, it would not fire the heat since I had it set to electric and not gas.

This look like what you might need, unless you did that already

https://diy.stackexchange.com/questions/164935/weathertron-xl1200-to-nest-thermostat

I'll try this method. Thanks!

 

[Chefwheredyougo]

Lennox Elite
Model C33-36A-2F-4
SERIAL 6008F26587