How do you know if your blower motor is bad?
Here are just a few of the signs that your blower motor is going bad.
- Weak airflow. This is one of the first signs of a bad blower motor that people tend to notice.
- Noises. Have you noticed any unusual noises coming from your vehicle’s HVAC system?
- Smoke or smells.
Where is the blower motor located on a BMW?
The blower motor is located behind the glove box on the passenger side of vehicle. The blower motor resistor (final stage) is utilized to control blower motor speed.
Is there a fuse for the blower motor?
Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.
How do I reset my BMW e39?
Press and hold the trip odometer reset button in the instrument cluster (left button), and turn the ignition key to the first position. Keep the button pressed for approx 5 seconds until one of the following words appear in the display: “Oil Service” with “Reset”.
What causes a blower motor to go out?
Blower motor breakdown can be the result of anything from old age to failed bearings, high amp draw, electrical failure in the windings, dirt accumulation, and more. “The most common cause is dirt accumulation due to lack of maintenance,” said Tom Beaulieu, president of Bay Area Services Inc.
How much is a blower motor for a BMW?
The average cost of a BMW ac blower motor is between $52.99 and $144.99.
Why has my blower stopped working?
If little air is coming through the vents (hot or cold), then it could be because the blower motor for the fan or a switch or resistor that controls fan speed isn’t working. Another cause might be that the electronically controlled “blend doors” that direct air flow are stuck or broken.
What is pin 3 on BMW 5 Series blower?
Pin # 3 (blue arrow) is the smaller blue wire, red tracer that carries the signal from the IHKA control unit to the final stage to command the blower speed. We will discuss testing the voltage signal on this wire later.
What is the green wire on the BMW E39 blower?
The green wire, blue tracer (red arrow) is the relay control (pin # 86) from the IHKA control unit. This wire should have voltage on it when the ignition key is on and the IHKA control unit is also on to activate the relay.
How to test the blower motor on a BMW?
Testing the Blower Motor: If you need to test at the blower motor you are going to have to remove the upper dash pad, driver side lower panel and the glove box to access it. Look at tech article on blower motor replacement to access the blower motor for testing.
Which is the ground for the blower motor?
The green / black is the ground for the blower motor. The final stage grounds this wire to get the blower motor to run. Pin #2 (yellow arrow) is the yellow / green that is the power supply from the blower motor relay. You should measure battery voltage with the ignition key on and the IHKA control unit.