What to Do When the Car's Air Conditioning Fan Doesn't Turn On?

[DeLucy]

Solutions for a car's air conditioning fan not turning on: 1. Use a multimeter to measure the contact resistance of the main control switch. If the resistance is too high or zero, repair or replace it; 2. Tighten the set screw; 3. Check the capacitor and replace it with one of the same specifications. Reasons for the car's air conditioning fan not turning on: 1. Poor contact of the main control switch; 2. Damage to the fan motor coil; 3. Loose set screw between the fan motor and the fan blade; 4. Open or short circuit in the fan capacitor. The car air conditioning refrigeration system consists of a compressor, condenser, liquid storage dryer, expansion valve, evaporator, blower, etc., connected by copper pipes and high-pressure rubber hoses to form a sealed system.

[Ulysses]

When the car's air conditioning is on but the fan isn't working, I can understand how hot it feels. You should first check a few spots to see if it's a minor issue. The fan fuse is in the engine compartment's fuse box—it might have blown, cutting off power, so try replacing it with a new one. Next, pop the hood and listen for any sound from the fan motor; if it's silent, the motor could be seized or worn out, needing lubrication or replacement. Also, check if the fan relay has poor contact—a gentle tap might temporarily fix it. If all these seem fine, the issue could lie with the AC control panel or wiring, but avoid DIY repairs here, especially with sensitive electronics. Excessive heat inside the car affects health and safety, so address it promptly or consult a professional. Regular maintenance of the fan system is crucial—keep the blades clean to prevent dust buildup and jamming.

[StIvan]

I've seen quite a few cases like this, mostly minor faults. There are usually several reasons why the fan doesn't spin: First, the fan fuse might be blown—check the fuse box location and replace it with a spare fuse. Second, the fan motor could be faulty—test it with power to see if it spins, and replace the motor if it doesn't. Third, the relay might be aged or malfunctioning—remove it and check if the contacts are oxidized. Also, pay attention to potential bugs in the fan control unit or loose wiring. Don’t overlook whether the AC settings are correct, such as accidentally adjusting the mode. In summer, the temperature inside the car can rise rapidly, increasing the risk of heatstroke. If not addressed promptly, it may damage the AC compressor and fan-related components, affecting cooling performance. It's recommended to visit a repair shop for precise diagnosis using professional tools to ensure reliable repairs.

[HarmonyRose]

The fan not working needs to be fixed ASAP, otherwise the car will get stuffy and unbearable. First, check if the fan fuse is blown—it's in the fuse box; refer to the manual to locate the corresponding fuse number and replace it. Then, turn on the AC and listen for sounds near the fan to identify the issue. If there's no sound, inspect the wiring for looseness or burn marks. If that doesn’t help, the motor might be stuck and need cleaning or replacement. Avoid tampering with complex wiring yourself to prevent electric shock or vehicle damage. This is a safety concern, especially when carrying elderly or children—poor airflow can lead to fainting and health risks. Delaying repairs could also damage the cooling system, leading to bigger repair hassles.