Hey everyone, I’m hoping someone can help me figure out this quirky issue I’m experiencing with my Nest thermostat and air conditioning system during the winter months. It’s been a bit puzzling, and I’d love to hear if others have encountered something similar or have any insights!
So, here’s the setup: I have a Nest thermostat that’s exclusively controlling my air conditioner. In the winter, I disconnect the outdoor unit for the season. I also have two other Nest thermostats managing my heating zones, which work perfectly fine. The issue arises when the outdoor temperature dips below about 10°F. At this point, my AC-only fan starts behaving strangely—it turns on for about 45 seconds and then turns off every 15 minutes or so. It’s quite the pattern, and I can’t quite figure out why it’s happening.
I’ve done a bit of troubleshooting already. I’ve checked the thermostat settings to ensure there’s no accidental heating or cooling schedule that might be triggering this. Everything seems to be in order. I’ve also considered whether it’s related to the hot water baseboard heating system, but since the Nest is only connected to the air conditioner, I don’t think that’s the culprit. Plus, the other thermostats aren’t showing any unusual behavior.
I’m curious if this is a known issue or if there’s something I might be missing in the setup. Could it be related to how the Nest interacts with the AC unit in cold temperatures? Or perhaps a calibration issue? I’m also wondering if others in colder climates have experienced similar quirks with their Nest thermostats or AC systems.
If anyone has any ideas or solutions, I’d be thrilled to hear them! I’m all ears for suggestions on how to resolve this so I can have a peaceful winter without the fan randomly kicking on. Thanks in advance for your help!