Performed heater maintenance on one heat pump system. Checked electrical, mechanical, safety, and performance of the system. Both heat strips heating upon test. Filter dirty and was changed with customer supplied filter. Coil and blower wheel are both clean. UV lights operational. Outside condenser refrigerant pressures within range and condenser clean. Capacitor within value. Drain line clear. No major issues were found and system running at time of departure. See attached checklist for full tune-up details.