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help!!! my air/heat works on high but now on any other lower setting.

Customer Question
before i start ripping the...
help!!! my air/heat works on high but now on any other lower setting. before i start ripping the whole thing apart what could it be?
Submitted: 8 years ago.Category: Toyota
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6/9/2010
Toyota Mechanic: Ron Z., - Toyota Tech - replied 8 years ago
Ron Z.
Ron Z., - Toyota Tech -
Category: Toyota
Satisfied Customers: 20,056
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This sounds like you are going to need to replace the Blower Motor Resistor. It's actually quite common of a problem. The resistor is located under the passenger's side dash, mounted to the HVAC housing, near the blower motor.

graphic

Ron Z.
Ron Z., - Toyota Tech -
Category: Toyota
Satisfied Customers: 20,056
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Customer reply replied 8 years ago
any other possibilities?
Toyota Mechanic: Ron Z., - Toyota Tech - replied 8 years ago


Nope. Actually quite common. When the blower resistor is bad, the lower speeds will not work due there being no resistance in the resisotor to slow the motor down. It will only work on High because the high speed requires no resistance.

 

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