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What are the causes and solutions for a car's air conditioning not cooling?

1 Answers

MacAutumn

07/29/25 12:55pm

Reasons for not cooling: Insufficient refrigerant due to low refrigerant levels; Presence of air in the system leading to inadequate cooling; Compressor malfunction causing it to stop working. Solutions: Replenish refrigerant; Perform vacuum and recharge; Replace the compressor. Related explanation: 1. Cooling principle: The compressor compresses gaseous refrigerant into high-temperature, high-pressure gas and sends it to the condenser for cooling. After cooling, it becomes medium-temperature, high-pressure liquid refrigerant and enters the dryer for filtration and dehumidification. The medium-temperature liquid refrigerant is then throttled and depressurized by the expansion valve, turning into a low-temperature, low-pressure gas-liquid mixture. It absorbs heat from the air in the evaporator and vaporizes, becoming gaseous before returning to the compressor for further compression, continuing the refrigeration cycle. 2. Heating principle: Heat pump heating utilizes the refrigeration system's compressor and condenser to heat indoor air. The heat pump heating works by electromagnetically reversing the positions of the refrigeration system and the exhaust pipe, allowing the refrigeration system to absorb heat outdoors and release heat indoors.

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