Performed preventative maintenance. Took amperage of indoor blower motor and electric heat strip. Calibrated and tested thermostat. Inspected and tightened electrical. Replaced filter customer provided. Cycled heating and cooling. Took temperature difference. Cleared drain pan and drain line. Located condenser on side of house. Inspected and tightened all electrical. Checked capacitor. Checked refrigerant levels. Took amperage of compressor and outdoor motor. Cleared debris from condenser housing. Rinsed condenser coil. System operating to factory standard. Recommend blower wheel cleaning. Spoke to customer and showed the biological growth, customer opted with blower wheel cleaning.