Abnormal Noise from Blower Motor
ABNORMAL NOISE SYMPTOM DIAGNOSIS OF A/C SYSTEM - BLOWER MOTOR
| Condition | Possible Cause | Action |
|---|---|---|
| Blower motor emits a chirping sound in proportion to its speed of rotation | Worn or damaged motor brushes or commutator | Replace blower motor . |
| Fluttering noise or large droning noise is heard from blower motor | Leaves or other debris introduced from fresh air inlet to blower motor | Remove debris and make sure that the screen at fresh air inlet is intact . |