I was called to a customer's home to repair a malfunctioning compressor. Upon inspection, I found that the defrost board was malfunctioning, causing the compressor to not turn on. I tested the lugs on the board and found that they were receiving the correct voltage, but the board was not functioning properly. I also checked the pressure in the system and found that it was low, indicating a leak in the evaporator coil. I quoted the customer for a new defrost board, evaporator coil, and full system replacement, and collected half the deposit.
