When I turn my ac or heater on nothing comes out None of the vents but the blower motor comes on

Asked by Jan 10, 2015 at 10:14 AM about the 1999 Chevrolet Silverado 1500 STD 4WD Standard Cab LB

Question type: General

1 Answer

40,015

Usually if you have a bad blend door, you either have heat or A/C. You say the motor runs but no air at all is coming through the vents. It almost sounds like a mouse or chipmunk has made a nest in your heater plenum. I have sent a video on how to drop the blower motor. Once out, see if any nesting material comes out. Pull your cabin filter. I think it is just to the left of the blower motor. Is it plugged solid with debris? If so, the nest may be further in. Also check the air filter under the hood. I have seen mice get in there and make huge nests under the filter element. https://www.youtube.com/watch?v=jrGFY6yqvFM

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