Omega Environmental Technologies, a distributor of aftermarket mobile air-conditioning parts and tools, offers some preventive maintenance tips that will keep a fleet's air-conditioning systems working at peak performance during summer.
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Inspect all hoses for signs of oil seepage and replace if necessary.
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Check all drive belts for crack or wear.
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Check inlet and outlet O-ring fittings for leaks and replace if necessary.
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Evacuate the system.
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Check the evaporator coil for debris and replace the intake filter if the unit has one.
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Replace all Schrader valves and check the voltage to both the clutch and the blower motor.
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Inspect and clean the condenser coil to allow proper airflow through the fins. If necessary, use a fin comb to straighten the fins for proper airflow.
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Replace the receiver-drier at least every year. The receiver-drier, which contains a desiccant that absorbs moisture that may occur, should always be the last component replaced in the HVAC.
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Inspect the oil for signs of compressor wear, moisture absorption, or other internal problems.
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Evacuate the system and recharge.
