Nest thermostat not heating recently. Testing heat works, but normal operation only blows cold air

[CoreyG]

Hello,

I've recently encountered an issue where my Nest thermostat is not activating heat properly. The system will read that it is heating, but it is only blowing cold air.

I have a heat pump and it was working up until just a few days ago (just before the new year).

I have performed tests and can confirm that the heat works in test mode, but it will not activate heat under normal operation.

Please help!

Thanks,

Corey

[Jhonleanmel]

Hi CoreyG,

Thanks for reaching out ― let's see what's going on.

Give these steps a try:

Check your air filter, as a clogged filter may cause a similar symptom. 
If the air filter is dirty and needs to be changed, I recommend replacing it and let us know if the issue continues after you change the filter.

Keep us posted.

Best,
Mel

[Jhonleanmel]

Hey there CoreyG,

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