We had a funny call last week, the customer had another company replace the condensing fan motor on her A/C unit. The A/C was not cooling.
When we checked the unit we found that the new fan motor was going the wrong direction causing pressure to be very high. We were able to reverse the rotation and started the unit. It was running normally and cooling the house. No harm done.
The next call was not so fortunate. When we arrived we found that the compressor had burnt out. The cause – plugged condenser coil. The compressor had to be replaced at a cost of almost $2000 with labor. We had to clean the condenser before we even started running the system.