Question about 2004 Chevrolet Silverado

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Heater only blows on hi speed all other speeds are not functioning

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HI. This will be the cause of a defective resistor switch. The speed variables have been damaged. This will happen, overtime. The necessary action will be to have this damaged switch replaced. This will be the actual switch that is located, and housed within the control cluster in the dash.(Speed selection switch)

Posted on Feb 01, 2010

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: The Heater fan in my 07 Passat only works on hi speed?

I totally agree with emissionwiz. Best wishes.

Posted on Jan 17, 2009

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SOURCE: How to fix 1999 lincoln TC heater/AC fan speed.

You have a problem with the resistors on your blower motor. 95% of AC/Heater blower motors are located under the glove box in the passanger foot well. When you remove the motor you should see a resistor plate. Resistors are not servicable and will need to be replaced. This is a relatively cheap part, that you can replace yourself if your handy, if not take it to your local tech.

Posted on Nov 13, 2009

teemossinmia
  • 265 Answers

SOURCE: 2001 Mazda Tribute (3.0 L) Heater motor functions on high only

Its the Blower Resistor....If it was the switch, it probably wouldn't work at all....But the Resistor will give you those symptoms, of working on high med or low

Posted on Jan 19, 2010

Bob Gemmell
  • 209 Answers

SOURCE: heater blows cold 91 lexus ls400

Sounds like a thermostat problem replace it

Posted on Jan 23, 2010

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SOURCE: Heater blows cold air at idle speed but warms as

check the coolant level possible leak at the intake manifold very very common problem on gm v6 or possibly your themostat is sticking and the increased rpm could force it open

Posted on Feb 25, 2010

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