On the Passenger side under the dash. It is attached to the ductwork for the air. You may have to pull the carpet back some. It looks like a flat rectangle that has ridges on it and is made out of clay or ceramic. replacing it is cheap and easy. I did have to get the part online for myself. I went for over a year at one setting I couldn't get over the fact it was just because of that stupid piece.
Heater blower resistor is what controls the low medium high speeds...
In the power distribution box under the hood. There is also a relay there that controls the fan. and last but not least, there is a resistor that controls all fan speeds.
Blower fan resistor controls electric current to the fan motor to maintain different speeds.
You most likely have a problem with your blower RESISTOR PACK or rheostat. This is what controls the high, med and low speeds on your heater. Where it is and how to change it depends on your vehicle.
A bad heater blower motor resistor would effect one or more blower speeds other than high.
the blower resistor controls the fan speeds
It sounds like the blower resistor assembly is defective. All fan speeds except for high go through resistors (that is what controls the speeds from low to high). Number 4 is high and has the full 12 volts going to the fan.
replace the resistor pack on the fanblower, under glowecompartment
replace blower motor resistor. It is under the passenger side foot well.
toyotas have a resistor bank in line with heater motor each speed has a different value resistor. there is no resistor on high speed. it is located on passenger side in heater duct I thank it has two screws holding it on when you get it out you will see the resistors burned
The resistor block or blower motor resistor is used to control the speed of the blower motor. That is how you get the lower speeds on your air conditioning or heater. The higher the resistance the lower the speed of the motor.
The blower resistor controls the speeds of the blower motor Hi-resistance lower motor speed Lo-resistance higher motor speed
blower resistor especially if its chrysler/jeep or blower switch
Sounds like you need to replace your blower motor resistor.
change the blower motor resistor . this controls the speeds . thanks paul
A common problem is that the heater resistor/ circuit board is defective and need to be replaced. The main symptom is that the heater fan with not run on the three low speeds but will run on high.
Probably the blower motor speed resistor is partially burned out.
Resistor on the heater blower motor has failed
Check the blower motor resistor as it controls the fan speeds. Also check the blower motor as it will burn out resistors if its drawing to much amperage
Blower wont work on all 5 speeds, usually the lower speeds tend to go first.
This is not a common failure. The more likely culprit is the blower moter resistor that controls the fan speeds. Very simple to fix yourself and about $35 for the part. To get more info about this or other Trailblazer '02 and up questions join our forum at www.trailvoy.com
99% of the time it is the heater resistor block, it is a bunch of resistors which gives you the different speeds. this is mounted close to the heater motor, pass side of the car. Usual cause of failure: water or snow inside the heater housing.
Sounds more like switch or resistor is defective
The blower motor resistor is defective. They go bad when the blower motor pulls to much amperage.
Short of it is the resistor controls the fan speeds for the blower. Easy to replace and to my knowledge only available through a dealer.