7B
Blower fan motor emits a chirping sound in proportion to its speed of rotation
There are various types of noise, ranging from those produced in the engine compartment to those from the passenger compartment, also from rumbling noises to whistling noises.
Abnormal Noise from Blower Fan Motor
Condition Possible Cause Action
Blower fan motor emits a chirping sound in proportion to its speed of rotation
Worn or damaged motor brushes or commutator
Repair or replace blower fan motor