Cornerstone A/C & Heating

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Check-Up

Maintenance

        Our 21 Point Cooling Check-Up         
Ask about our No Breakdown GUARANTEE*
for systems in good working order
This service is recomended for Spring & Summer
( March through November )                                                        

                                                                                     
  1 ) Check  head pressure.
  2 ) Check suction pressure.
                     
  3 ) Record head freon temperature.
  4 ) Record suction freon temperature.                      
  5 ) Record indoor air temperature .
  6 ) Record supply air temperature.
  7 ) Calculate subcooling and superheat.
  8 ) Record amp draw on compressor.
  9 ) Record amp draw on the outdoor fan motor.
 10 ) Inspect points on contactor.
 11 ) Inspect condenser coil for blockage.
 12 ) Inspect high voltage connection to condenser.
 13 ) Inspect low voltage connection to condenser.
 14 ) Check air filter.
 15 ) Check thermostat calibration.
 16 ) Inspect evaporator coil for blockage (if accessible.)
 17 ) Inspect condensation overflow drain pan.
 18 ) Inspect condensation drain line.
 19 ) Check air flow to all supply air registers.
 20 ) Inspect return air duct.
 21 ) Calculate temperature change for system.
This is a detailed inspection for systems in good working order.
If your system needs cleaning or a boost in efficiency we recommend our Cooling Tune-Up.

*Non-working systems will require a diagnostic fee to determine fault.







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