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
