What Causes a Car Blower to Stop Working?
2 Answers
There are many reasons why a car air conditioning blower may fail to operate, usually due to motor malfunctions or poor electrical connections. Common causes include: blower motor failure, blower motor control module failure, faulty blower switch, or issues with related wiring such as open circuits, short circuits, or poor contact in connectors. Additional information about blowers is provided below: 1. Function: The car blower's role is to distribute cold air from the evaporator or warm air from the heater core into the vehicle cabin. If the blower stops working, it will affect the overall performance of the air conditioning system. 2. Symptoms: The main symptom is that while the compressor engages when the AC is turned on, the blower fails to operate when its switch is activated.
The other day my car's AC suddenly stopped blowing air, and I found the blower wasn't spinning at all. After some troubleshooting, here are the common causes: First check if the fuse is blown - it's in the small box under the dashboard, pull it out and inspect; if the metal wire inside is broken, you'll need a replacement. Next test the AC switch button - sometimes poor contact or a faulty panel causes unresponsiveness. The motor itself aging or burning out is another major culprit, especially in older vehicles where the fan may seize or internal wiring short-circuits. Also, the resistor that regulates fan speed tends to overheat and burn out - when faulty, low speeds won't work. Finally, don't overlook loose wiring connections, which often occur after bumpy rides. In my case, replacing the fuse fixed it. I recommend prompt repairs to avoid suffering in a stuffy car during summer.
