Performed heat pump inspection/certification for home to be sold. Inspected the air handler. Replaced the air filter (20x20x1). Confirmed proper high voltage (230v) for heat kit as well as high voltage (120v) for air handler. Confirmed proper low voltage (24v) coming off the transformer for control of the system. Tested the temperature differential between supply and return. Heat pump operating without heat kit had a rise of 23°. With heat kit active system had a temperature rise of 63°. Both of these reading are within manufacturer specifications. Made sure drain piping was clear of any restrictions. Inspected indoor coil for debris buildup. No abnormal buildup in the coil. Went outside to inspect the heat pump unit. Tested the capacitor and contactor. Both have less than normal wear compared to age. Confirmed proper high voltage (240v) to heat pump. Tested the amp draw for the blower motor, heat pump fan motor and compressor. All 3 were operating properly per manufacturer specs.