BMW 323i Blower Motor Resistor
BMW 323i Blower Motor Resistor: Troubleshooting Tips and Tricks
After a long and tiring day at work, it is comforting to know that you have your BMW 323i to take you home. This is where you can relax as you drive to your destination, while the radio is tuned in to mellow music and the A/C is blasting cold air to keep you cozy. To enjoy this kind of comfortable ride all the time, you need to make sure all parts of your A/C system is up and running in good condition. Simple parts like the blower motor resistor play a crucial role in letting you experience better ride quality. This resistor regulates the voltage sent to the blower motor so that the fan will run efficiently and supply air to your interior at your desired temperature. When your BMW 323i blower motor resistor becomes faulty, your vehicle's heating and A/C system will function poorly, causing the fan to run only at a single speed. In some cases, the fan won't even function at all. Trying to turn the climate control fan knob to your desired speed and temperature won't do the trick. The only thing you can do is to check the blower motor resistor and do some troubleshooting to fix the problem right away. Here are some tips and tricks to help you out:
Stuck at high-speed setting
A fan that operates only at a single speed is a sign of a bad blower motor resistor. Usually, the fan is stuck at a high-speed setting, so you won't be able to switch it to your desired speed and temperature. If you have a faulty blower motor resistor, the gap between the connectors increases, making it extremely difficult for electric current to flow across properly and activate the fan at lower speeds. Testing the resistor for proper function is easy with the help of a digital multi-meter. The readings from the device should match the ohm rating of the resistor; otherwise, replace the resistor to fix the problem.
If your blower motor suddenly stops sending air to your interior, then you need to check on the resistor's circuit board. This part powers the resistor and allows the blower motor to function properly. The heating and cooling process can damage the circuit board over time, causing it to become brittle and eventually break. Inspect the circuit board for signs of damage and get a replacement if necessary.