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| Gearheadotaku | Heater won't shut off | ||
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Guru
 
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before I get the Vette out for spring (just a month or so away) I'd like to find the source of my constant heat. I've got an '88 with the "automatic" climate control. Even in the off or vent funtion, heat pours out of the lower ducts. A/C works normal, so does defrost. You can turn off the fan, but as soon as you are moving hot air comes out of the ducts again. (Pressure from outside air at speed i guess) I stuffed a bunch of foam in the ducts to block the hot air, my feet are happier, but I'd like to fix this correctly.
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Posted on: 2008/2/14 13:06
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In the servitude of my fiberglass Mistress |
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| MK 82 | Re: Heater won't shut off | ||
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Quote:
before I get the Vette out for spring (just a month or so away) I'd like to find the source of my constant heat. I've got an '88 with the "automatic" climate control. Even in the off or vent funtion, heat pours out of the lower ducts. A/C works normal, so does defrost. You can turn off the fan, but as soon as you are moving hot air comes out of the ducts again. (Pressure from outside air at speed i guess) I stuffed a bunch of foam in the ducts to block the hot air, my feet are happier, but I'd like to fix this correctly. If I recall correctly, There is a vacuum operated door to close off the heater core. You could also put a shut off valve inline in the heater hose in the engine compartment. We had a discussion on this matter recently. I suggested the valve for just this situation. Don't think yours has the vacuum heater valve in the engine compartment?  ] |
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Posted on: 2008/2/14 16:21
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| pianoguy | RE:Heater won't shut off | ||
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I don't have a solution, but I can tell you that would be a highly desirable feature today in MN :tongue:
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Posted on: 2008/2/14 16:54
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| pappyfreebird | RE:Heater won't shut off | ||
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i rekon i follow drop ts thoughts...ive had the vacuem doors nawt opperate properly...at idle alls well ...but give her some throttle n the low vacuem will let the doors flop open ...higher throttle lower vacuem>>.
also agree wid the pianaman ... well dont seem that cold (compared to 30 below) but i r really gitton tired of plowin sno n repairin equipment...i need some grass!!!!!  |
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Posted on: 2008/2/14 19:19
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| Gearheadotaku | RE:Heater won't shut off | ||
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yes, there is a vacuum operated valve in the heater line. I would assume that it is triggered shut under A/C operation, but should it remain shut unless heat is called for? Does the vacuum signal open or close it? Maybe the blend door isn't operating correctly? Oh goddess, please don't make me tear into the dash.....
Is there a practical way to ditch the fancy pushbutton BS and hookup the standard controls? (there goes the dash again...)  |
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Posted on: 2008/2/15 0:19
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In the servitude of my fiberglass Mistress |
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| MK 82 | RE:Heater won't shut off | ||
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Senior Guru
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I believe the valve is normally closed. It opens with vacuum. You have three choices:
1. Live with it 2. Install a manual valve 3. Troubleshoot and fix the problem which usually involves some dismantling of the dash while standing on your head! |
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Posted on: 2008/2/15 2:23
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