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Normally when a heater blower motor only works on the High setting, it is caused by a defective Blower Motor Resistor Pack. The fix is to, Replace it. In very rare instances it can also be a defective blower motor speed control switch, but rarely.
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∙ 16y ago
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Heater only works on high speed?
The heater motor speed resister is burned out.
Heater only works on high?
The blower motor speed resistor is burned out.
My vectras heater fan only works on full its a 52 plate?
The blower motor speed resister may be burned out.
What is wrong when the heater AC blower motor only works on one speed Ford Explorer?
The blower motor works on only one speed. The blower motor resitor pack is defective and needs to be replaced. It is located on the blower housing in the engine compartment just below the blower motor.
Heater motor only works on high 2002 dodge caravan 95000miles?
Replace heater motor resistor.
1991 cevy s-10 pickupblower switch only works on 4th position?
The heater blower motor speed resister is burned out.
Cause for low speeds on blower fan 1994 ford not to come on high speed works?
Resistor on the heater blower motor has failed
What causes the heater blower motor in a 2003 Trailblazer to not work in speeds 1-3 but works in speeds 4 and 5?
Probably the blower motor speed resistor is partially burned out.
1992 Chevy suburban heater switch only works on high speed?
There is a resistor/ circuit board near the heater motor that need to be replaced. You can get one from almost any auto parts store.
Heater fan switch works only on the highest setting?
The blower motor speed resistor is burned out. You can replace only the resistor but the resistor probably burned out because the blower motor is going bad. If you want to fix it for good, replace both the blower motor and blower motor speed resistor.
What would cause a heater not to work in a 1989 Cadillac De Ville?
Could be, heater blower motor has failed. blower motor fuse is burned out. blower motor speed resistor is burned out. blower motor switch is bad. or, if the blower motor works but you have no heat it could be, cooling system is low on coolant. thermostat is stuck open. heater core is plugged. temp blend door actuator is faulty.
If the heater fan only works on speed 5 in a 2001 silverado what is the problem?
Sounds like the blower motor resistor. Should be near the blower motor under right side below glove box!
