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I have a 2003 jeep liberty and the heat only blows on speed 2 and 4 would i need to replace the whole blower motor or just the resistor and if it is just the resistor,is it located in the glove box?
Re: I have a 2003 jeep liberty and the heat only blows on...
Spray it with electric spray contac cleaner right in where the switch is work the switch after you spray it.check resistor for low amps if high replace it.
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this sounds like the heater motor resistor has gone bad and needs replacing.this controls the amount of voltage that goes to the blower motor to give you the different speeds.if it was the blower motor it wouldn`t have worked on #4 setting before stopping.this us located in the air box as it uses the air flow from the motor to help keep it from getting too hot,usually in the area of the motor and has about 5wires connected to it.
maybe check the heater fan motor by hooking it direct to power and if it blows full power then it has to be the resistor or maybe the switch for the speed control is burned up.
sounds like the blower motor resistor/blower motor module is bad. They use a series of resistors to drop voltage to the blower motor to make it spin at different speens. High speed bypasses the resistors and allows full voltage to the blower motor.
The lower speeds are accomplished by running the power supply through various resistors that drop the voltage which makes the blower turn at different speeds. The lowest setting uses all the resistors to drop the voltage as much as possible to turn the blower as slow as possible. High speed uses no resistors so the blower gets full power and turns as fast as possible.
Since speed 1 and speed 2 use the speed 3 resistor to drop there voltage and speed three is not working as well my guess is the speed three resistor is burnt out in the device referred to as the blower motor resistor or blower motor speed control module. This is located near the blower motor and is held in place with 2 screws. There will be several wires and possibly two connectors plugged into it.
These are really common failures in many vehicles. The parts are usually available at your local auto parts store and they are typically not that expensive.
OK. So the blower notor isn't operating. Do you have power to the blower motor? The resistor is new from what I got. If you don't have power to the blower motor, then check the speed control switch and fuses. If you have power at the blower motor, replace the blower motor
Sounds like the blower motor resister is bad, it regulates the speeds of the blower motor, it should be located somewear around the blower motor, 2 screws hold it in the heater box and it has a electrical plug to it.
sounds like your usual resistor problem,should be under the passenger side dash in the heater box,might even be behind the glovebox,when u pull it out it should be obvious if its the problem
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