What are the symptoms of a faulty blower motor?
2 Answers
Automobile blower motor failure can affect the normal operation of the car's air conditioning system, preventing cold air from being distributed properly. This may lead to evaporator coil icing. If the temperature sensor switch malfunctions simultaneously during icing, high pressure may build up in the air conditioning refrigerant lines, potentially causing them to burst. Below are common blower motor fault diagnoses: 1. Blower fan not rotating: After prolonged use, excessive dust accumulation increases friction between the rotor and bearings, potentially causing rotor obstruction or seizure, leading to coil overheating and damage. 2. Blower not rotating but producing loud humming noise: Possible causes include capacitor failure (loss of capacitance or severe leakage) or damage to the starting winding.
When the blower broke down, the first thing I noticed was that the air conditioner completely stopped blowing air. Whether it was cold or hot air, there was no response even when the switch was turned to the maximum. The car became as stuffy as a steamer. Sometimes, I could also hear strange noises, like buzzing sounds, or smell a burnt odor, which usually indicates the motor has overheated and failed. Driving with the windows down on rainy days wasn't an option either, as the fog obscured the windshield, severely impairing visibility and making it particularly dangerous. After discovering this issue, I tried adjusting the fan speed and modes, but it was futile, so I had to pull over to inspect it. First, I checked if the fuse had blown and tried replacing it with a new one. If that didn't work, the only option was to send it for repairs. Otherwise, long-term neglect could lead to a complete failure of the air conditioning system, resulting in even higher repair costs.
