What Causes a Car Air Conditioner to Fail to Turn On?

1 Answers
SpencerLynn
07/30/25 10:38am
Car air conditioner failure to start is mainly a symptom of issues with the air conditioning system and the compressor. The following are detailed reasons why a car air conditioner may fail to start: 1. Circuit system failure: Short circuits or open circuits in the wiring directly disrupt the path of electrical transmission, preventing the electromagnetic clutch from properly regulating the compressor's operation. Use a multimeter to test the circuit section by section, locate the fault point, and repair it. 2. Lack of refrigerant: Refrigerant and refrigeration oil are mutually soluble and circulate back to the compressor through the system. If the Freon in the refrigerant is depleted, it will affect the refrigeration oil, leading to insufficient oil return and reduced lubrication of the compressor, causing it to seize and fail. Refrigerant should be replenished. 3. Mechanical wear of the compressor: Long-term operation under high-speed rotational load conditions may cause premature mechanical wear of compressor components, rendering them inoperable. The compressor should be inspected and repaired, with worn parts replaced.
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