No power to thermostat after installing Nest thermostat.


Old 06-15-15, 08:30 PM
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Join Date: Jun 2015
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No power to thermostat after installing Nest thermostat.

Everything was working fine until I decided to install a "Nest" smart thermostat to reduce my bill/ usage.
Once I completed install I received an error code which meant no power to thermostat.
I contacted Customer Service to help me with the install. We were unsuccessful in installing the new thermostat as well as the old thermostat! Ugggh!
After locating the 3amp fuse I discovered that it was burnt. I replaced it thinking that I found the problem and resolved it...
Guess what? Still not working 😡😠😵😓
Thank you for input from the Texas Sweat Lodge.
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Old 06-15-15, 09:00 PM
PJmax's Avatar
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Join Date: Oct 2012
Location: Northern NJ - USA
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Welcome to the forums.

Did the fuse blow again ?

If you require help from us you need to give us information to work with.
We need to know what color wires were on which terminals of old thermostat.
What colors did you connect to what terminals on the nest ?

We may need a picture of your wiring connections at your air handler where the thermostat connects.

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