it sounds like the blower motor is clogged up with debris mainly due to a build up from over the years. remove the blower motor fan and make sure it isn't full of debris
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.
You have a bad blower motor resister..........
There is nothing wrong with the motor there is something wrong with the switching circuits
Bad resistor at the blower motor? Bad blower motor switch?
Resistor pack on blower motor? Fan switch? Low speed relay?
replace the blower motor switch
the resistor for the blower motor is busted blower works on high with out it
look thru past answers. only takes a little time.
The blower motor works on only one speed. The blower motor resitor pack is defective and needs to be replaced. It is located on the blower housing in the engine compartment just below the blower motor.
Probably your blower motor speed resister is burned out.
The blower motor resistor has failed.The blower motor resistor has failed.
it's a problem with the blower motor resistor,