Air conditioning systems should be operated only when outside air temperature is above 65 degrees Fahrenheit; below that temperature, the system will not operate properly, may shut down due to safety controls, and could be damaged by operating in too cool temperatures.
The compressor pumps refrigerant gas under high pressure through a condenser coil. Compressors have a service life of 12 to 15 years and are the most critical component in the air-conditioning system.
Central AC units should have 3 feet of clearance. If the compressor, condenser, and condenser fan are part of a split system and are located in a separate unit outside, check the air flow around the outside unit to make sure it is not obstructed. Check for dirt and debris, particularly on the condenser coils and fins, and look at all electrical wiring and connections.
The louvers of the whole-house fan should open completely when the fan is running. Clean the louvers when they are dirty. Be sure to cover the fan opening when the unit is not being used, especially during the winter in cold climates. The fan thermostat should be set at around 95 degrees Fahrenheit. The fan should start and run smoothly.
Source: “Now that you’ve had aHome Inspection” Home Maintenance Manual by Ben Gromicko
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