A seasonal check-up should include the following items for Air Conditioning or Heat Pump:
- Clean and adjust thermostat
- Check voltage and amperage to all motors
- Check air flow across the indoor cooling coil
- Lubricate all moving parts (unless permanently sealed)
- Check air filters
- Check air flow across the outdoor coil
- Check indoor fan relay
- Check compressor contactor
- Check electrical wiring and connections
- Check that condensate drain is open
- Check indoor coil Check operating pressures
- Check temperature drop across indoor coil
- Check indoor coil super-heat
- Check outdoor sub-cooling
- Check reversing valve (heat pump only)
- Check defrost control (heat pump only)
- Check outdoor coil
