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12-06-2004, 11:11 AM | #1 |
Oilfield Trash
Join Date: Sep 2003
Location: Raymore, Sk, Canada, Earth
Posts: 3,170
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Need Help with Heater/Defrost
On my 70 GMC (with A/C) the defrost isnt working, there is warm air coming from the vents but the windshield won't unthaw, any ideas?
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14 Dodge 3500 Mega Cab 08 Dodge 3500 Mega Cab 87 Chev 3+3 4x4 80 GMC K10 High Sierra bone stock 70 Chevelle 350SS long term project 68 GMC 3ton Grain Truck/Garbage wagon 50 Pontiac 2 Door Coupe Project "I've got a shotgun rifle and a 4 wheel drive and a country boy can survive" Hank Jr. |
12-06-2004, 12:02 PM | #2 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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It is probably your diverter box. The doors come loose from the shaft that moves the door and the shaft moves but the door doesn't. That would be the first place to check. (The diveter box is next to the heater box).
Jim |
12-06-2004, 01:11 PM | #3 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Maybe your defrost hoses are off the vents.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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