When you beat the blower motor, you are probably shaking the blower resister. The resister is what controls the blower speeds and is probably bad or loose.
the resistor for the blower motor is busted blower works on high with out it
Bad resistor at the blower motor? Bad blower motor switch?
A blower motor that only works on high is normally caused by a defective Blower Motor Resistor Pack. DRL, do not have a clue.
from what i have read it is the blower motor resistor it goes bad and only lets the fan run on high google blower motor resistor and read on
replace the blower motor switch
it's a problem with the blower motor resistor,
If you are referring to the blower motor only working on the high speed setting, then the problem is the blower motor Resistor Pack is defective. Replace it. It can be the blower motor speed control switch but not likely.
Probably your blower motor speed resister is burned out.
The blower motor speed resistor is burned out.
If it has only high speed, the blower motor resistor has to be replaced to get all speeds back.
Defective Blower Motor Resistor Pack.
The blower motor fuse protects the blower motor electrical circuit. The blower motor relay operates only the high speed function of the blower motor. The blower motor speed resistor operates the lower speed functions of the blower motor.