Thermostat shows heating but it's not

[Blackroses]

Nest thermostat shows that it's heating but it's not heating. 
This happens randomly. Workaround is : Turn nest off  (from app) and back to heating mode.

Furnace Type; High Efficiency Lennox - installed in/around 2015

Two stage heating

 

[Jhonleanmel]

Hi Blackroses,

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 the air filter and let us know if the issue continues after you change the filter.
Keep us posted.

Best,
Mel

[Jhonleanmel]

Hey there Blackroses,

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

Best, 
Mel

[EmersonB]

Hi everyone,

@Blackroses just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

I appreciate the help, Mel.

Thanks,
Emerson