If your AC unit won't turn on, the first thing you should check is if there was a blown fuse or a tripped breaker. There's a good chance that the problem is a tripped breaker if the circuit was overloaded. ... However, it is also possible that a power surge caused your air conditioner to blow a fuse or trip a breaker.
How do I reset my Lennox air conditioning unit?
- Shut Down Your AC at the Thermostat. The first step in resetting your AC thermostat is to turn it off at the AC unit. …
- Find Your Circuit Breaker Box. ...
- Reset the Circuit Breaker for Your AC Unit. …
- Wait 30 Seconds. …
- Turn the AC Thermostat Back On.