Air Condition Unit
15K rooftop Unit. Went on a overnight concert trip this weekend and camped in a grass parking lot. It was exceptionally hot/humid for this time of year and we were running both A/C units as hard as ...
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Remove the return air filter on the ceiling. With a good flashlight see if you can see the cooling coils up there. When I did this there was no question that ice had formed. While looking up there I saw what looked like a cooking thermometer dangling on a wire. After I thawed the ice off the coils I could see where that sensor was just stuck into the cooling fins and held in place by friction. I just stuck the sensor back into the fins and never had another problem with the unit. The sensor turns off the compressor if it detects ice on the fins. The fan melts the ice and the compressor starts back up.
