What Causes the Car Air Conditioner Fan to Stop Working?

[Freddy]

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.

[MacAlaina]

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.

[BrandonRose]

As a driver, I've encountered many fan malfunctions. The most common issue is a blown fuse—try replacing it with a new one of the matching model. Another reason could be a failed fan motor, which may burn out or wear down, resulting in weak rotation. Relay failure is also frequent; it controls the circuit's on/off function, so if it's broken, the fan won't operate. Circuit shorts or opens can also cause problems, such as due to aging or exposed wiring harnesses. Issues often arise in high temperatures, so it's advisable to have a professional repair shop inspect it promptly to avoid affecting your air conditioning use.

[DelMason]

My view is straightforward. If the fan isn't working, first check the fuse, as it's prone to burning out and causing power failure. A faulty motor may prevent it from spinning, and loose circuit connections can also lead to failure. Address these issues promptly to prevent damage to the air conditioning system.