What are the reasons for a car air conditioning pump not working?
3 Answers
Reasons for a car air conditioning pump not working: 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 controlling the compressor's operation. 2. Lack of refrigerant: Refrigerant and compressor oil are mutually soluble and circulate back to the compressor through the system. When the Freon in the refrigerant is depleted, it leads to insufficient oil return, reducing the compressor's lubrication and causing it to seize or damage. 3. Compressor mechanical wear: Prolonged operation under high-speed load conditions can cause premature mechanical wear of compressor components, rendering it inoperable. 4. Belt tension: An overly tight belt can directly cause the compressor to seize and stop running, so it's important to regularly check the belt's tension. Conversely, a belt that's too loose will cause the compressor's power transmission to slip, resulting in intermittent cooling and reduced performance.
I recently encountered an issue with the air conditioning pump not working while driving, which was really uncomfortable during the hot summer weather. Later, I had a mechanic inspect it, and he said the common cause is insufficient refrigerant triggering the system's protection mechanism, causing the pump to automatically stop running. Additionally, blown fuses often occur, and you can check the corresponding position in the fuse box. Relay failures can also cause signal interruptions, or the compressor itself might be mechanically stuck. I recommend testing refrigerant pressure and electrical connections during regular maintenance, as small issues can develop into major problems if not addressed promptly. When driving, try to keep the air conditioning on periodically, as this helps maintain system health.
During my car repairs, I've encountered numerous cases of air conditioning pump failures, usually caused by electrical issues. Aging relays can prevent current from passing through, causing the pump to fail to start; blown fuses are even more common, especially during short circuits or excessive loads. Refrigerant leaks can trigger the system's low-pressure protection, rendering the pump inoperative. Loose or worn belts may also slip and affect operation. When troubleshooting yourself, first use a multimeter to measure the supply voltage and check if it's normal. If simple fixes don't work, you'll need a professional mechanic to disassemble the compressor and inspect for internal seizure. Don't delay repairs for too long, as driving without a functioning air conditioner in summer can lead to fatigue.
