HVAC fan control

Anything related to the factory RPO Crew Cab.

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sonoma
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HVAC fan control

Post by sonoma »

number 4 setting on the controls just quit on me
1.2.3 work just fine but when i switch to 4 the fan turns off
whats the problem and how do i fix this issue
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HenryJ
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Post by HenryJ »

I would check the high fan speed relay. The other positions are controlled by the switch and a series of resistors.

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