My nest seems to be unable to turn the fan off. After running the AC last night, the fan did not turn off all night despite showing that the AC was only used for a total of 12 minutes. I know that the nest uses airwave technology but that would not cause the fan to run all night. Another common cause I’ve seen is that fan is set up to always on or some other schedule within the app. I’ve double checked all the settings and that is not the cause.
To test I’ve set the fan to run for 15 minutes from my phone within the google home app and the nest can turn on but when the 15 minute timer is up the fan does not shut off and the app does not show the fan to be running. All attempts to turn the fan off after that are unsuccessful. I tried manually setting the thermostat to turn on and off the fan again but the fan continues to run. The only way to turn the fan off is to turn off the breaker to the fan and unplug the nest from the hooks for 5 seconds. The same thing happens if I set a 15 minute timer from the nest itself, it will not shut off.
Has anyone else encountered this situation where the nest is able to turn on the fan but cannot turn the fan off? Any workarounds or suggestions?
