Most thermostats are powered by the hvac system, but they still have batteries in case of a power outage.

Thermostat won t turn on after power outage. This is a common problem. Here’s how to reset your thermostat if it’s not working correctly: If the fan doesn't come on then check voltage at the furnace between r and c if you have 24 vac then you lost the connection between the furnace and stat on the r connection.

If it’s not working, you’ll have to replace the broken fuse. After 30 minutes, check to see what your thermostat is set to. One of the thermostat takes backup batteries, so i put new batteries in.

If they’re dead, replace them. You want it about five degrees less than the current temperature of the room so it will start working. Connecting a nest thermostat to an incompatible system, such as a millivolt, proprietary or high voltage system, won’t deliver the power needed to charge your thermostat’s battery and can.

1.1 boot in the safe mood. But we won’t go into. If your thermostat is not powered by batteries, you’ll want to check if your.

Have you tried power cycling the appliance. Set to cool and lowered. Is your ac not working after power goes out?

Turn the thermostat back on. Power issues with your ecobee may be caused by a number of things. Keep the thermostat turned off.