My heat and AC is not working on my 1998 c1500.

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#14943 Closed 1998 Chevy Silverado c1500 public

My heat and defrost have all but stop working in my truck. Nothing comes out the dash vents and very little comes out the bottom and when I try my defrost it starts making a whining or humming noise.


I would start by tracking down the noise that you are hearing. Chances are it is related to your concerns. Two things that come to mind are a faulty mode actuator or a faulty blower motor.

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