Nest gen3 shows E79 even though 24V coming through C wire

[kltarheels]

Nest Thermostat now showing an E79 error code even though multimeter shows 24V coming through the C wire. Addtionally the app says last contact was 16 days ago even though I've been changing the temperature since then successfully.

[CoolingWizard]

When you used your digital or analog multimeter, what was the exact voltage that was being reported by the multi meter?

The AC Cooling Wizard

[Jhonleanmel]

Hey folks,

We appreciate your help here, @CoolingWizard.
@kltarheels, 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'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.

Thanks,
Mel