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What are the reasons and solutions for a car air conditioner not starting?

1 Answers

Susanna

07/30/25 2:14am

Car air conditioner not starting is mainly a symptom of issues with the air conditioning system and compressor. The following are detailed reasons and solutions for a car air conditioner not starting: 1. Circuit system failure: Short circuit or open circuit in the circuit directly loses the path for power transmission, preventing the electromagnetic clutch from properly regulating the compressor's working state. Solution: Use a multimeter to test the circuit segment by segment, locate the fault point, and repair it. 2. Lack of refrigerant: Refrigerant and refrigeration oil are mutually soluble, circulating 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, reducing the compressor's lubrication effect and causing it to jam or damage. Solution: Refill the refrigerant. 3. Compressor mechanical wear: Long-term operation under high-speed rotation load may cause premature mechanical wear of compressor components, rendering them inoperable. Solution: Inspect the compressor and replace worn parts. 4. The air conditioner has not been cleaned or maintained for a long time. Solution: Clean the air conditioner promptly.

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How many liters of coolant does a Mercedes-Benz S350 need to add?

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