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• Fan Motor - Check the fan motor, oil it, & make sure it runs perfectly!

• Air Filters – Check  air filters for any clogging. Replace air filters.

• Fan Belts - Test the fan belts. Check any old or loose fan belts. 

• Refrigerant Pressures - Ensure operating pressures on refrigerant is within manufacturer specs.

• Electrical - Check the electrical wiring and tighten connections.

• Contactor - Test the compressor contactor for proper operation.

• Capacitors - Test capacitor voltage balancing under all modes of operation.

• Inspect Condenser Coil - Check the outdoor AC condenser coil for correct performance.

• Measure Sub-Cooling - Ensure outdoor sub-cooling is within manufacturer specs.

• Compressor Operation - Test the compressor voltage and mechanical operation.

• Crankcase Heaters - Test the crankcase heaters.