HVAC - Airflow Distribution - Front: NVH Dodge Durango II

VIBRATION

Possible causes of front or rear blower motor vibration include

1. Improper blower motor mounting
2. Improper blower wheel mounting
3. Blower wheel out of balance or deformed
4. Foreign material in blower wheel causing out of balance condition
5. Blower motor faulty.

NOISE

To determine if the front or rear blower motor is the source of the noise, simply switch the front or rear 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. Blower motor faulty.