Any HVAC techs???
- Thread starter Chefwheredyougo
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Mrtakeoff53
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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.
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Chefwheredyougo
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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
Active Member
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.
Dr. Dendrostein
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Sailingeric
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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
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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
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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?
Crabs McJones
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Any chance you can lift up the wires so I can see the labels underneath?
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Chefwheredyougo
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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.
Sailingeric
Valuable Member
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
diy.stackexchange.com
This look like what you might need, unless you did that already
Weathertron Xl1200 to Nest Thermostat
We have a Trane Weathertron Xl1200 heating pump with the thermostat pictured below and are trying to replace it with our new Nest thermostat. Our old system has a variable speed air handler and we ...
Crabs McJones
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Last question and i'll start doing some reasearch, whats the make and model of your furnace
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Chefwheredyougo
Valuable Member
I'll try this method. Thanks!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
Weathertron Xl1200 to Nest Thermostat
We have a Trane Weathertron Xl1200 heating pump with the thermostat pictured below and are trying to replace it with our new Nest thermostat. Our old system has a variable speed air handler and we ...
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