While inspecting the HVAC system for musty smell we ended up completing a performance check. During the performance check we discovered a bad battery capacitor at the condenser, the system was not properly charged with refrigerant and the condenser did not have a surge protector installed on it. After addressing these problems, the system is operational and the Fojtik's will monitor the musty smell from the mildew on the coil. We need to inspect it during the heating season.