Upon my arrival an AC repair, in Red Rock, I spoke with the customer about their concerns with having a blank thermostat. I checked the auxiliary safety float switch and found it was tripped. When I checked the drain line it was not plugged. I pulled the drain line apart and did not find any reason anything blocking it on the inside. I removed the water from the float switch and tested the system. I checked the calibration on the thermostat because the customer stated it didn’t seem to be reading accurately. I made some adjustments to it while on site and we will check it again when we return for the walk through.