Question about 1996 Cadillac Eldorado

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1996 Eldorado.When driving with air vents on they will sometimes go to defrost mode. Can not get them to change to vent mode until it decides to do it on its own.

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It is a vacuum issue. Let up on the gas will up the engine vacuum and that should help.

Posted on Sep 24, 2009

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Air does not blow out the dash vents, only comes out the floor and defrost. 1996 le saber


The mode door is what changes where the air comes out. So either the mode door is stuck/broken or the actuator is bad. OR, the control head isn't commanding the actuator to work.

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My air condition and heat works on defrost only sometime comes out vents last seconds didn't matter were controller set


Not sure what year, make or model vehicle is in question, but the issue is due to an actuator that has gone bad. Sometimes referred to as a mode actuator or blend door actuator. This actuator controls where air/heat will blow from (defroster vent, forward vents, floor vents or combo, etc.). Good luck. Ron @ Speed-O-Repair.

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ur r going to have to check the button or the release lever that alouds u to move the air to the other positions sometimes that's the problem

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On a 1996 model you probably have vac actuators that control air flow. Look under the dash and you may be able to see the actuator that controls flow to the defrost and vents. There would be another one for temp control.

Jul 02, 2013 | Cars & Trucks

1 Answer

I have a 1995 Corvette and when I turn the air conditioner on the dashboard vents does not blow cool air


the a/c control is electric for temp control and vacuum for mode control when a leak occurs it defaults to defrost floor .look for a leak or broken vacuum line first then control panel then mode actuator.

Jul 30, 2012 | 1996 Chevrolet Corvette

1 Answer

1990 corvette can't change air vent from defrost mode


The mode door defaults to defrost when it loses vacuum. I would start by checking for cracked/ loose vacuum hoses in the engine compartment.

Mar 18, 2012 | Chevrolet Cars & Trucks

1 Answer

My 1996 Jimmy had the blower motor and heater core replaced and now the air will only blow out of the top defrost vent no matter what vent is selected for A/C or Heat. The vents were working before he...


If I remember correctly the mode door is vacuum operated. Check to make sure that there is vacuum to the control head. If not is is possible you knocked the vacuum line off when replacing the heater core. The default position for a vacuum controlled mode door on just about every vehicle is the defrost position. This is so if there is a failure in the system you will at least still have a clear windshield to see through.

Jan 21, 2011 | 1996 GMC Jimmy

2 Answers

1976 cadillac eldorado ac is charged comp clutch engages but heat stays on changed heater control valve blower blows out floor barely out ac vents or def


Sounds like the blend door actuator which diverts air from defrost,to bi-level,vent etc. It's vacuum driven and when it fails, it's usually an indication of a vacuum leak. To trace the leak, start the car, turn the AC on high and starting at the firewall in front of the passenger's side, trace the vacuum lines backward until a leak is detected. If no leak is detected, it's very likely that the blend door actuator is faulty and needs either repair or replacement. Best of luck.
Greg

Sep 10, 2009 | 1976 Cadillac Eldorado

1 Answer

I have a 1996 eldorado, after changing oil at jlube i started the car and noticed ac on and temperature set as hot as possible,i took off and immediately smoke came out of vents and now theres no air...


there is nothing that is going to break by having the AC on and then turning up the temperature all the way except a little worse fuel mileage. Keep in mind that your AC comes on during the defrost mode to help dry the air inside your car so your windows dont fog up. If there is no air movement then it sounds like the blower fan decided it was time to quit. It just happened now instead of the middle of winter or the day you needed the defroster--(defogger)

Apr 27, 2009 | 1994 Cadillac Eldorado

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