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John
John, Master A.S.E Automotive technician
Category: Chevy
Satisfied Customers: 9176
Experience:  A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
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2000 Chevy S10: Defroster does not work..Heat and ac runs just fine.

Resolved Question:

Defroster does not work in my 2000 Chevy S10. Heat and AC runs just fine.
Submitted: 5 years ago.
Category: Chevy
Expert:  John replied 5 years ago.

Hello & Welcome to JA,

Is your system manual or automatic temp control ?

Customer: replied 5 years ago.
Automatic
Expert:  John replied 5 years ago.

Ok, this is computer controlled With actuators/electric & vacuum controls. The first thing I would do is to view the information from data & fault codes in the electronic control climate module. One will need access to a scan tool that will access the BCM (body control module). Make sure the vacuum to the to the vacuum solenoids is sufficient/ engine vacuum & holding. Here are a couple of pics . The control or the solenoid pack can be at fault IF there is good vacuum to this control.

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