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Discussion Starter #1
Earlier this week there was a thread about a similar issue on a Canyon PU. My issue is slightly different, maybe the same cause.

Fan speeds don't change by turning the dial, but it will blow harder as the engine RPM increases. No where near full speed, but alteast it generates some air movement at 2000 RPM or so. Running around town and at stop lights it's miserable.

All other electrical things seem okay.

Thanks in advance for any ideas.
 

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I had a Dakota that just would not turn on at all- It was a heat sensor that looked like the spring in a pen. It was located under the hood at the fire wall on the pas. side. That was an 89.Things changed I'm sure. I aslo have a 96 Tahoe where the fan controls go off when they want to!! Always at the worst time.
 

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Dennis

Have had the same problem with my 99 Tahoe heater/AC fan switch. I have replaced it twice when it does this, due to the wiring connections on the back getting hot and melting.

Please have it checked out before it causes bigger problems.The switch is rather inexpensive, and with a little patience, you can replace it yourself.

Dannny
 

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There is also a vaccume diaframe that uses the engine vaccume check it to see if the large tube is cracked. should be near fire wall on left looking from front
 

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Discussion Starter #7
Thanks for the advise. I have the resistor coming tomorrow and I'll look for the vacumn thing tonight.
 
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