Today I arrived on site and performed a winter time maintenance on your HVAC equipment. Indoor Unit (Air Handler): Checked the pleated 1" filter (20x20x1) and noted its condition as fair. Observed the indoor coil condition as fair. Outdoor Unit (Heat Pump): Observed the outdoor coil condition as fair. Electrical Components: Tested and confirmed proper operation within manufacturer specifications for: Blower Motor Heat Strip Kit Condenser Fan Motor Compressor Blower Run Capacitor Compressor Run Capacitor Fan Run Capacitor Compressor Start Capacitor Contactor Electrical Wiring Identified the Defrost Control Board as not working properly or within manufacturer specifications. System Components: Inspected and confirmed good condition and proper operation of: Blower Wheel Secondary Drain Pan Primary Drain Pan Electrical Wires Secured Ductwork Measurements & Adjustments: Measured a return air temperature of 72.0°F and a supply air temperature of 92.8°F. Cleared the condensate drain line