replace the resistor pack on the fanblower, under glowecompartment
Heater blower resistor is what controls the low medium high speeds...
A bad heater blower motor resistor would effect one or more blower speeds other than high.
blower resistor especially if its chrysler/jeep or blower switch
Probably the blower motor speed resistor is partially burned out.
Resistor on the heater blower motor has failed
Blower wont work on all 5 speeds, usually the lower speeds tend to go first.
The blower motor resistor is defective. They go bad when the blower motor pulls to much amperage.
You have a relay located behind the glove box once removed to the left and you also have a blower resister that controls the speeds located on the passengers side in the blower motor housing..............
Only for the high speed blower function. The lower speeds go thru the blower motor speed resister.
Year make model aside, most have power going to motor and grounds are through the blower motor resistor, setting speeds by using different resistors on the board, or in the case of automatic climate control, a power resistor control board, usually located in the heater box near the blower motor, google or ebay for one for your vehicle, get a picture of it in your head and look around the blower motor. They have diodes in them that fail and you will lose all speeds and other times, one or two.
you need a new rheostat !
Yes, located in the blower motor resistor pack. Follow the wires backward from the blower motor to find it.