Hi Hanleyrtcc,
It sounds like you're experiencing an issue with your Nest Thermostat where the AC fan is turning on randomly when in heat mode. This can be a frustrating situation, but there are a few things you can try to troubleshoot and resolve the issue.
- Make sure that your thermostat is properly configured and updated with the latest software. Sometimes, software glitches can cause unexpected behavior, and updating it may address the issue.
- Check the thermostat's settings to ensure that it's set to the correct mode (heat mode) and that the fan settings are configured appropriately. The Nest Thermostat has different fan settings such as "Auto" and "On." In heat mode, the fan should typically be set to "Auto" so that it only runs when heating is required.
- Additionally, review the wiring of your thermostat to make sure it's correctly connected. A misconfiguration in the wiring can lead to unexpected behavior. Do you have a Heat Pump system? If so, please share with us your old thermostat and Nest Thermostat's wiring setup so we can see how it was being configured.
I'll look forward to your response.
Best regards,
Mark
