Check the heat exchanger (heating check in fall)
Inspect disconnects (AC in spring, heating in fall)
Check thermostat
Check filters
Check contactor and condensate line
Test capacitors and operations
Clean/tighten electrical connections
Test safety and limit switches
Check refrigerant levels and systems pressures (AC check in spring)
Clean the burners (heating check in fall)
Inspect the pilot system (heating check in fall)
With a heat pump system - test temperature split, rinse condenser coils, check evaporator coil & perform amp draw on condenser motor and compressor
Oil furnaces
Window and wall units
Systems that are unsafe for Pro to access safely to perform tune-up
Free filters (However if you provide us with a new one, the Pro will install it for you)
Cleaning of condensate line stoppages (requires new service request)
Recharging refrigerant (requires new service request)
Evaporator/indoor coil cleaning, including acid cleaning beyond hosing with water
Cleaning or unclogging services to correct problems related to lack of manufacturer recommended maintenance
Geothermal systems, mini-split systems, boilers, swamp coolers, window and wall units, and oil furnaces