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What are the causes of intermittent cooling failure in car air conditioning?

2 Answers

Janet

07/29/25 8:02am

Car air conditioning intermittent cooling failure is caused by dirty condenser, lack of refrigerant, or damaged air conditioning flap. The following are specific details: 1. Types: There are three causes of intermittent cooling failure in car air conditioning: dirty condenser, lack of refrigerant, and damaged air conditioning flap. 2. Details: Dirty condenser - The purpose of cleaning the radiator and condenser is for heat dissipation. Engine cooling system issues can cause the condenser to lead to excessively high engine temperature or poor air conditioning performance. Use an air gun to clean it thoroughly. Lack of refrigerant - Car air conditioning requires refrigerant replenishment within three years. Although the air conditioning system is tightly sealed, it cannot prevent refrigerant leakage if there are minor leaks in the air conditioning pipes or condenser. Damaged air conditioning flap - The flap motor is located in the lower middle part of the instrument panel and serves as the main switch for air conditioning vents. When the air conditioning is cooling, cold air may leak out from gaps due to a damaged flap.

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LeChristian

08/12/25 11:15am

Last time I took this car on a long trip, the air conditioning intermittently stopped cooling, which was really annoying. Common causes could be low refrigerant levels or leaks—when pressure is insufficient, the AC stops working, then resumes when pressure recovers. If the compressor is worn or faulty, it may work intermittently, directly affecting cooling. Loose wiring connections or short circuits are also common, as bumps and vibrations on rough roads can destabilize connectors. A faulty temperature control sensor may cause the system to misjudge the temperature, leading to sporadic operation. It's advisable to monitor the air vent temperature while driving and promptly check refrigerant levels and electrical components—don’t wait until you're stuck in the car on a scorching day to regret it. During regular maintenance, top up Freon and check for leaks to prevent issues—safety first.

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