Hey everyone! I had the same problem with my heat being stuck on high. I changed out my blower motor resistor and took pictures. I created a step-by-step tutorial on how to do this fix yourself. It's very easy and costs about $9.50. Here is a link: http://bvensko.blogspot.com/
Pull out the lock on the blower motor resistor wire harness connector to unlock the connector latch . Depress the latch on the blower motor resistor wire harness connector and disconnect the connector from the resistor. Remove the two screws that secure the blower motor resistor block to the HVAC housing. Remove the resistor block from the HVAC housing............
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.
It is a resistor or a group of resisters used to control the flow or current in a circuit. Like the resistor block in a car controls the speed of the a/c blower.
To test the blower motor resistor, unplug the resistor connector. Each blower motor switch input terminal on the resistor must have continuity to the resistor output terminal, which is connected to the circuit going to the blower motor. If the blower motor resistor continuity does not check OK, replace the faulty resistor.You need a multimeter to test the resistor block and there should be continuity between all terminals.
It's in the resistor block, which in the diagrams comes right after the fan control switch
this resistor is located next to the blower motor in the heater plenum. the coils sit in the air stream. remove the connector and the fasteners and pull the resistor block out.
behind the glove box
Behind the glove compartment on the dash.
The blower motor is located in the same area as the resistor, it's held in with 3 screws. Removing them will allow the motor and wheel to drop down.
Sounds like a bad blower motor resistor block.
What do you mean resistor block, what does is do. There is not such thing called that. Controls fan speed... somewhere in dash Blower motor resistor? It's way up under the passenger side of the dash. You have to take the blower motor out. Right up next to the firewall. You should take out the passenger seat to get up in there.
Chances are that the blower resistor is blown. The resistor is located on the bottom of the blower, located in the passenger side footwell. If the problem is with the resistor them the blower will only work on high speed, other than that it might be a broken wire.