Question about 2006 Chevrolet HHR

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The fan control will only work on full blast. the low and medium will not

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Hi, this problem happens when the bower motor resistor goes bad. the reason it works on hi is because it is supplying full voltage and the other speeds are reduced voltages from the resistor. so replacing the blower resistor witch is very inexpensive will fix your issue!

let me know if you have any more question. good luck

Posted on Oct 02, 2009

  • Jon Beasley
    Jon Beasley Aug 27, 2012

    what would cause the replacement resistor to go bad after only about 3 or 4 days?



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Fan control switch only works on high

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On any other vehicle it sounds like the blower fan switch.
The fan switch provides power or ground to the resistor and there would be a high speed blower relay to bypass the resistor.
But in your case the fan switch is part of the controller.
I don't have a diagram for a 92 but the 94 model shows relays for low medium and high speeds. Each relay gets power from a fuseable link. The high relay gets power thru the low relay if the low relay is not engaged.
If you have the model with 3 relays you may need to check them.

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I think you are referring the fan control switch. Normally the fan has to work before the AC will turn on.

So if the ac is working only on higher spped settings, you need to confirm if the fan is actually working at the low settings.

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Your blower motor resistor needs to be replaced. when they go bad, for some reason the fan will only work on high. Replace that resistor and you will be good to go. Let me know if you have any further questions. Thanks for using FixYa!

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