the heater resistor needs to be replaced it is mounted in the heater box next to the blower motor
The blower motor speed resistor is burned out.
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
A typical blower motor relay only operates the high speed function.
Probably the blower motor resistor is shot.
The blower motor speed resistor is probably burned out.
Blower motor resistor is bad. It is a little circuit board with resistors on it that changes voltage to the blower motor. When it goes bad, you get full speed only.
because the blower motor is no good, for some reason it get damp in the blower motor chamber, and slowly the speeds start to go one by one until you just have high.
Blower motor resistor defective
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.
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 burned out. The resistor is usually found close to the blower motor. Auto parts stores carry that part and it is easy to replace.
There isn't a transistor but there is a blower motor resistor. The purpose of it is to control fan speeds. Normally when it goes bad it will let the fan run on high only. It is located under the dash on the passenger's side near the blower motor.