How to Repair a Car Blower That Won't Turn On?
2 Answers
There are many reasons why a car blower may stop working. Below is a detailed introduction to the causes and solutions: 1. Dust accumulation: After prolonged use, excessive dust buildup can increase the friction coefficient between the rotor and bearings, causing the rotor to become obstructed or even jammed, leading to overheating and damage of the coil. Solution: After disconnecting the power, open the rear cover of the blower, add a few drops of lubricating oil (such as sewing machine oil) into the bearing sleeves at both ends of the rotor, and gently rotate the blades while adding oil until the blades move freely, thereby resolving the blower issue. 2. No 220V AC input or damaged coil: It might be due to no 220V AC input or a damaged coil. Solution: In this case, cut off the power, disconnect the two lead wires of the blower from the power supply connection points, and leave them suspended (ensure the two ends of the power wires do not touch each other to avoid a short circuit). Turn on the power and carefully measure both ends of the power wires with a test pen. If one end lights up and the other does not, it indicates the power input is normal, and the issue may be a damaged blower coil. If both ends light up or neither does, it suggests a problem with the power input.
A few days ago, the blower in my car stopped working. After checking, I found that the first step is to inspect the fuse. Locate the corresponding position of the blower in the fuse box and use tweezers to pull it out to check if it's blown. The second step is to test the blower motor. Remove the glove compartment on the passenger side and directly connect the motor to a 12V power source for testing. If it still doesn't spin, the motor is likely dead. The third step is to check the resistor, which is a small box in the air duct. If the resistance value is abnormal, it needs to be replaced. Finally, inspect the control switch and wiring. In my case, the switch had poor contact, and spraying some rust remover fixed it. If you're doing the repair yourself, make sure to have a multimeter ready for testing. Removing the motor requires dismantling the entire dashboard, so it's recommended to seek professional help to save time and effort.
