Want this question answered?
The blower motor speed resistor is burned out.
It might be your resistor, does it work on 4 but not on 1,2,3? If so, you need a new blower motor resistor.
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
Probably the blower motor resistor is shot.
It will not run if the engine computer is unhooked.It will not run if the engine computer is unhooked.
What can happen when a blower motor resistor goes bad is that the motor will run and then suddenly stop running on a regular basis. Sometimes the blower fan will not turn on and cause the motor to overheat.
The blower motor speed resistor is burned out. The resistor is located close to the blower motor and is easy to change. Your local auto parts store will have that part for you.
Blower motor bad. Blower resistor bad. Switch bad. Fuse blown.
the heater resistor needs to be replaced it is mounted in the heater box next to the blower motor
If you have 12 volts at the blower, And the blower runs when it is straight wired. The blower switch runs through a resistor that allows the blower to run in low, medium-low, medium-high. Find and check this resistor. Most of the time it is located on the passenger side of the firewall.
When the fan is on high it does not run through the blower motor resistor. The low speeds don't work because the blower motor resistor is bad.
The blower motor speed resistor is probably burned out.