No Heat! Thermostat thinks everything is fine

[Dp2020]

Had six hour power outage on December 15. I have no error messages woke up to no heat and cannot get the heat to come on nest thermostat says the equipment is working but I’m getting no heat. I reset the thermostat twice and still no heat I turned off the system at the breaker box twice and that didn’t help it’s Christmas Eve and it’s very cold.  help!

[HVACRhacker]

I'd try isolating the problem to either the thermostat, furnace or wiring.

If you are qualified and comfortable working with low-voltage wiring, with the nest thermostat removed from it's base, TEMPORARILY shorting the red (R or Rh) and white (W) wires together should cause the furnace to run continuously until you un-short the R and W wires.  If that fails to start the furnace, the problem is probably NOT the thermostat, and after turning off the power to your furnace, you could try TEMPORARILY shorting the R (or Rh) and W contacts/screws  AT THE FURNACE  CONTROL BOARD, restore power, and see if the furnace runs.  If it does, then the issue is with your wiring or thermostat.  DO NOT OPEN OR WORK ON YOUR FURNACE UNLESS YOU TURN OFF THE POWER AT THE CIRCUIT BREAKER, FIRST. 

Hope that helps you to not freeze.

[Jhonleanmel]

Hey folks, 

We appreciate your help here, HVACRhacker.
Dp2020, I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Thanks,
Mel

[Jhonleanmel]

Hey there,

Checking back in should you still have some questions here. Let us know by replying to this thread. 

Best, 
Mel

[Jhonleanmel]

Hi everyone,

Just one quick final check in here since activity has slowed down. We haven't heard from you in a while so we'll be locking this thread if there is no update after 24 hours. If you have any new questions, updates or just a discussion topic, feel free to start a new thread in the Community.

Thanks,
Mel