stswulf Posted July 25, 2005 Report Share Posted July 25, 2005 The ac and or vent cuts out on my 1996 Seville when randomly when im driving, up hill especially, it works fine then it cuts out, and comes back like nothing happened HELP its 115 where I live Link to comment Share on other sites More sharing options...
WarrenJ Posted July 26, 2005 Report Share Posted July 26, 2005 The ac and or vent cuts out on my 1996 Seville when randomly when im driving, up hill especially CLASSIC symptoms of a vacuum hose leak. Regards, Warren There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises Link to comment Share on other sites More sharing options...
JasonA Posted July 26, 2005 Report Share Posted July 26, 2005 Check the vacuum hose that runs to the canister underneath where the battery mounts. It's very common for that hose to get corroded with battery acid and "leak" vacuum. Fix that leak (or wherever you might find the leak) and you'll be good to go. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
caddypete Posted July 26, 2005 Report Share Posted July 26, 2005 Now I have another problem to go look for, On wide open throttles, my air conditioner cuts out and blows warm air. And all this time I was content thinking it was designed to cut off the air to get back the horsepower that the air compressor uses Link to comment Share on other sites More sharing options...
JasonA Posted July 26, 2005 Report Share Posted July 26, 2005 Now I have another problem to go look for, On wide open throttles, my air conditioner cuts out and blows warm air. And all this time I was content thinking it was designed to cut off the air to get back the horsepower that the air compressor uses In that case, it does. At WOT, the A/C compressor is locked out. But if you have the problem were the air quits blowing all together, it's usually a vacuum leak and the air mix door is falling closed. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
caddypete Posted July 26, 2005 Report Share Posted July 26, 2005 Thats even better now I don't have to go searching for a new problem Link to comment Share on other sites More sharing options...
KevinW Posted July 26, 2005 Report Share Posted July 26, 2005 But if you have the problem were the air quits blowing all together, it's usually a vacuum leak and the air mix door is falling closed. The air mix door varies the temperature of the discharged air by varying the proportion of air that passes through the heater core, not the volume or the point of delivery. If no air is being discharged from any vent, the HVAC blower motor or related circuitry would be suspect. Vacuum problems may result in an incorrect delivery mode (e.g. cool air from the heater vents), but not an absence of air blowing. There is always a default path for air delivery when there is a loss of vacuum control. ___________________________________________________ Link to comment Share on other sites More sharing options...
JasonA Posted July 27, 2005 Report Share Posted July 27, 2005 But if you have the problem were the air quits blowing all together, it's usually a vacuum leak and the air mix door is falling closed. The air mix door varies the temperature of the discharged air by varying the proportion of air that passes through the heater core, not the volume or the point of delivery. If no air is being discharged from any vent, the HVAC blower motor or related circuitry would be suspect. Vacuum problems may result in an incorrect delivery mode (e.g. cool air from the heater vents), but not an absence of air blowing. There is always a default path for air delivery when there is a loss of vacuum control. Kevin, you are correct. I mis-spoke when I said the "air mix door". What I meant was the door that controls which vents the air comes out of (defrost, face, floor, etc). Whatever door that is called. Usually when this problem happens, you get the perception that there's no air coming from the system, when in actuality it's going to defroster/floor vents under periods of low vacuum. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
Ranger Posted July 27, 2005 Report Share Posted July 27, 2005 Whatever door that is called. Air delivery door. Link to comment Share on other sites More sharing options...
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