Question about 1997 BMW 328

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A/c & heater fan

No matter how high you turn up the fan it seems to only run on low. not sure if i should be looking at the motor or resistor pack?

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  • tracirenella May 25, 2009

    When you say motor you talking about the blower motor correct? The condensor was just replaced we pulled a vacuum on it and charged it. It puts out cold air when we turn the A/C on just at a low fan speed no matter how high or low the fan control level is. Same with the heater, it works just low fan speed so you barely feel any cool air for A/C and hardly any warm air when heat is on.

  • tracirenella May 25, 2009

    You said check the wires from the fan to the blower motor from what I understand there is no wires that run from the fan to the motor. So what exactly do you mean?



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Look at resistor first, if not that then the switch is bad inside car

Posted on May 25, 2009

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Two things you will have to check and confirm the fault. first is check the wiries from the fan to the motor .it should have 12 volt .if it has the 12 volt then its a resistor problem.but if does not have 12 volt then its definately the motor problem. but if you dont have multimeter to check the voltage of the wire.then if the motor is too old .and in the motor there is a coil if that seems to be burnt its motor. as mostly in this case for low speed the motor is faulty.
please do rate the solution.thank you for using fixya.keep updated.thanks

Posted on May 25, 2009


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2. Check your available voltage at the blower motor on the different settings. it should vary with high supplying 12volts, make sure to do this check with the blower motor still plugged in.

3. Connect the blower to a 12v power source and see if it runs at high speed.

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