What Causes the Car Air Conditioner Fan to Stop Working?
2 Answers
Here are the specific reasons and solutions for a car air conditioner fan not working: 1. Poor contact of the main control switch: Repair method: Use a multimeter to measure the contact resistance of the main control switch. If the resistance is too high or zero, it should be repaired or replaced. 2. Damage to the fan motor coil: Repair method: Use a multimeter to measure the contact resistance of the main control switch. If the resistance is too high or zero, it should be repaired or replaced. 3. Loose fastening screw between the motor and the fan blade: Repair method: Tighten the fastening screw. 4. Open or short circuit of the fan capacitor: Repair method: Check the capacitor and replace it with one of the same specifications.
During that long-distance road trip I took, the AC fan suddenly stopped working - what a nuisance. The issue was likely a blown fuse, since the fan's circuit protection device is prone to overload and burn out. When I opened the fuse box, sure enough the corresponding fuse was blackened and charred. Replacing it fixed the problem. Another common cause is fan motor failure - like seized bearings or burnt-out coils. I once had a fan that just buzzed without spinning, and the mechanic said it was due to motor overheating and aging, requiring complete replacement. Additionally, loose or corroded wiring connections frequently occur. When I inspected the plug, I found rust buildup - cleaning it restored normal operation. I recommend regular AC system maintenance to prevent dust accumulation and clogging, which extends lifespan and saves money.
