HVAC - Service Information: NVH Dodge Dakota III

VIBRATION

Possible causes of a blower motor vibration include

1. Improper blower motor mounting
2. Improper blower wheel mounting
3. Deformed blower wheel
4. Out of balance blower wheel due to foreign material in the wheel
5. Faulty blower motor

NOISE

To determine if the blower motor is the source of the noise, simply switch the blower motor from Off to On. To verify that the blower motor is the source of the noise, unplug the blower motor wire harness connector and operate the heater-A/C system. If the noise goes away, possible causes include

1. Foreign material in the HVAC housing
2. Improper blower motor mounting
3. Improper blower wheel mounting
4. Faulty blower motor