Hello @Jchadwick,
Thanks for posting in the community and providing us that information. I apologize for the inconvenience your Nest Thermostat may be causing.
I understand that you are having issues with the AC system because it’s no longer working since the installation, but no worries, let's troubleshoot it together:
- Check for power:
- Ensure the breaker switch or fuse controlling power to your system is turned on.
- Check if any switches for fans or other components need to be turned on.
- Verify wiring:
- Turn off power to your system and thermostat at the breaker or fuse box before adjusting any wiring.
- Carefully remove the thermostat display.
- Check that wires are inserted correctly, fully inserted, and have ⅜ inch (6 mm) of exposed wire.
- Ensure wires are connected correctly to the system board.
- Reattach the display, turn on power, and test your thermostat.
- Check wiring diagram:
- If you don't have the original wiring diagram, try to find a picture of the thermostat wires that you took during installation.
- If necessary, access the system control board to take a picture of the wiring.
- Use the picture to enter the correct wire connections into the Nest app.
- Re-test system:
- Turn on power: Turn on power to your system at the breaker or fuse box.
- Test the thermostat: Go to Settings > Equipment > Continue > Test on your thermostat.
If you continue to experience issues, please let me know, and we can explore further troubleshooting steps.
Regards,
Catheryn
