What Causes Intermittent Car Air Conditioning?

[VanAdam]

1. Air Filter: The air filter in the vehicle's air conditioning system is excessively dirty and needs replacement. 2. Refrigerant: The air conditioning compressor lacks refrigerant, causing it to operate abnormally. 3. Control Panel: The air conditioning control panel is damaged. 4. Automatic Air Conditioning: The vehicle is equipped with automatic air conditioning, which turns off the system when the set temperature is reached. There are two ways the vehicle's air conditioning system operates: The first method: Press the AC switch directly to turn on the air conditioning system, then adjust it via the air conditioning control panel to achieve the desired cooling effect. The second method: Press the AUTO button to activate the automatic air conditioning. Once activated, simply adjust the temperature, and the air conditioning system will operate normally without any issues.

[LeCassandra]

I've encountered quite a few cases where the car AC works intermittently. The main reason is refrigerant leakage, which causes unstable system pressure and makes the compressor cycle on and off. The compressor itself could also be problematic, such as clutch wear/sticking or motor failure. Electrical issues like poor relay contact, blown fuses, or corroded switches can randomly cut off power. Additionally, unstable AC fan speed or condenser blockage leading to poor heat dissipation may trigger the protection mechanism to shut down the system. Don't ignore this issue - driving in summer heat affects safety. I recommend first checking fuses and listening for abnormal fan noises. If the problem persists, it's best to get a comprehensive diagnosis and repair at a professional shop.

[OliveMarie]

It's really frustrating when the air conditioning intermittently fails while driving. For example, the other day on a long trip, the AC suddenly stopped cooling, then resumed after half an hour. It's probably caused by insufficient refrigerant leading to pressure fluctuations that trigger automatic system shutdown, or possibly the compressor clutch failing to engage. A burnt-out fan motor or unstable rotation speed can also cause poor heat dissipation leading to shutdown. Blocked pipelines or dirty filters can similarly make the AC work intermittently. Personally, I think it's best to start with simple checks: see if any fuses in the fuse box are blown or if connectors are loose. Regular maintenance like refrigerant replacement and filter cleaning is important. If the cause remains unclear, it's better to get it repaired promptly to prevent minor issues from turning into major faults.

[DelEmily]

I've experienced the air conditioning suddenly turning off and then restarting, making the car stuffy and uncomfortable. It could be due to a faulty fan not spinning, affecting heat dissipation, or the compressor clutch not engaging properly. A refrigerant leak causing erratic system pressure fluctuations can also lead to this issue. Electrical problems like an aging control module or poor contact may cause random shutdowns. It's recommended to check if the fuses are intact and listen for any unusual noises from the blower. Regular maintenance is advised to avoid these troubles.