My unit stopped working. Even the digital thermostat died. I put backup batteries in, reset at the fuse box, and got about 30 minutes working air. I removed the batteries to see if the electricity to the thermostat was still working and a few minutes later the unit stopped working again as did the digital thermostat. I put the batteries back in the thermostat and did the same thing. The thermostat is on because of backup batteries but fan not spinning. :(