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Why does my jeep ac get stuck on defrost? - 2003 Jeep Grand Cherokee

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coskuarsiray
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SOURCE: why is my jeep stuck on defrost?

you have to check vacuum canister and vacuum lines. when a vacum line is cracked or canister has a crack you cant control air directing doors in hvac system, becasue engine creates vacuum and this canister is connected to vacuum lines and you can only control hvac system when vacuum exist on electric panel equipped Ac systems, you do not need vacuum to control blending doors. there are electric motors.

Posted on Nov 20, 2011

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1 Answer

1998 jeep ac works fine,compressor is good but only blows air now thru the defroster belt is all good as well what could cause this???


There is a mode selector on the hvac compartment. IT has a lever on it that selects where the air comes out. The lever is broken inside, outside, stuck of the module that moves it is bad or has connection problems.

Aug 08, 2014 | Cars & Trucks

1 Answer

My ac is stuck on defrost if i move the controller it stays there.


the vacuum supply source is not there check for vacuum under hood to dash. on passenger side by firewall.

May 24, 2014 | 2000 Jeep Cherokee

1 Answer

Stuck in defrost mode


Do you have manual AC system? This uses vacuum from the engine inlet to move the actuator. Most of the time a loose or broken vacuum line is the problem.

Feb 01, 2014 | 2002 Jeep Grand Cherokee

1 Answer

I have a 1999 Jeep Cherokee Sport and when I Turn on the AC it only blows from the defroster and not out of the vent. Please help.


Usually a sign of a faulty blend door under the dash. The blend door could be stuck, or the vac or electric motor could have failed.

Jul 15, 2013 | Cars & Trucks

1 Answer

My 2002 Jeep Grand Cherokee Laredo with manual climate control AC light goes off and AC stops working whenever it wants. I can force the AC to work by holding the AC button in real tight.The AC l


Have a good mechanic to check to see if the door of the a/c and heater and defroster is working properly. I had the same problem and one mechanic said he could fix it for $750. I got it fixed by an honest mechanic for less than $100. Good Luck!!

Jul 18, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

1999 Jeep grand cherokee ac is stuck on defrost


You have lost the vacuum source from the engine. Check the vacuum storage canister behind the passenger side headlight for leaking or damage.

Jul 09, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Why is my jeep stuck on defrost?


you have to check vacuum canister and vacuum lines. when a vacum line is cracked or canister has a crack you cant control air directing doors in hvac system, becasue engine creates vacuum and this canister is connected to vacuum lines and you can only control hvac system when vacuum exist on electric panel equipped Ac systems, you do not need vacuum to control blending doors. there are electric motors.

Oct 27, 2011 | 1993 Jeep Cherokee Country

1 Answer

1997 jeep wrangler ac will not blow out of main vents,blow out at feet and defrost vents


Maybe your dashboard vents are clogged, obstructed or stuck in close position somehow.

If not, check the air hoses that carry the cooled air to the main vents are not clogged, bent, ripped or simply detached.
If its practical for you, check if they are correctly placed, clean and general conditions are ok if you can.

If above are not the issue, go to check outlets of the A/C unit, its filters for the possible reason.

Jul 08, 2009 | 1997 Jeep Wrangler

1 Answer

Jeep AC blows cold air at defrost and feet but not through vents


There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.

Jul 01, 2009 | 1999 Jeep Grand Cherokee

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