Heat OK AC OK NO Defrost Fan?
#1
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Location: Missouri
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Heat OK AC OK NO Defrost Fan?
2002 Dodge 2500 Diesel - All heater settings work fine and all blower speeds work great... Same with A/C all work fine. Issue is no defrost air in either selector setting on the selector ****. The fan stops when defrost is selected.
Any Ideas? I have read a lot about the HVAC but it doesn't seam to be a door issue.
Could it be a bad computer control module? I'm told that there is no connection between the door moving and the blower working.
Just not sure where to look now?
Any Ideas? I have read a lot about the HVAC but it doesn't seam to be a door issue.
Could it be a bad computer control module? I'm told that there is no connection between the door moving and the blower working.
Just not sure where to look now?
#2
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I haven't heard of this problem before so after looking in the book of lines it shows the "mode selector sw" directly provides a ground for the blower in all positions except off. You need a new mode select sw or could try cleaning the contacts with contact cleaner first.
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Checked the switch and it must have warn contacts. After switching it a few times (30) or so it started to work. Think I should replace it for a long term fix.
Thanks
Thanks
#6
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Contacts do get dirty so I would try cleaning them with "contact cleaner" from your local electronics store, spray it into the switch and work it LOTS it may require 2 or 3 applications before you get it in there and cleaned.
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