Holes in defrost door
08-16-2022 | 05:48 PM
#1
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Joined: Mar 2022
Posts: 9
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From: North Carolina
Year: 2001
Model: Cherokee (XJ)
Engine: 4.0
Holes in defrost door
I have a 2001 jeep Cherokee XJ and Iv been having an issue where no matter what vent mode I have my AC on air will blow through the defrost vent as well as whatever vent I have it set on. I don’t believe it’s a vaccum issue because all the vents open and close as they should including the defrost vent.. the air that’s escaping through the defrost vent seems to be coming thru 2 holes that look factory made into the defrost door. My question is it normal for there to be those 2 holes in that door and if so should air be coming thru them when the door is closed?
07-10-2024 | 02:09 PM
#2
Newbie
Joined: Jul 2024
Posts: 2
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From: Kentucky
Year: 2000
Model: Cherokee (XJ)
I have a 2001 jeep Cherokee XJ and Iv been having an issue where no matter what vent mode I have my AC on air will blow through the defrost vent as well as whatever vent I have it set on. I don’t believe it’s a vaccum issue because all the vents open and close as they should including the defrost vent.. the air that’s escaping through the defrost vent seems to be coming thru 2 holes that look factory made into the defrost door. My question is it normal for there to be those 2 holes in that door and if so should air be coming thru them when the door is closed?
07-10-2024 | 02:59 PM
#3
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Newbie
Joined: Mar 2022
Posts: 9
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From: North Carolina
Year: 2001
Model: Cherokee (XJ)
Engine: 4.0
Yes it was actually a vaccum issue after all I replaced both vaccum check valves under the hood there’s one beside the intake manifold and one on the passenger side firewall where the AC lines come out I can’t remember which one fixed the problem but I haven’t had an issue since. Also it’s normal for a small amount of air to come through the defrost vents no matter the setting.
Last edited by Graham123; 07-10-2024 at 03:05 PM.
07-10-2024 | 03:03 PM
#4
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Joined: Mar 2022
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From: North Carolina
Year: 2001
Model: Cherokee (XJ)
Engine: 4.0
It’s a one way check valve so to test you can remove them and you should only be able to blow through one end.. if you can blow through both ends then it’s bad. Also there’s some vaccum lines behind the glove box and if those have holes in them it could cause the problem.
07-11-2024 | 01:09 PM
#5
Newbie
Joined: Jul 2024
Posts: 2
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From: Kentucky
Year: 2000
Model: Cherokee (XJ)
It’s a one way check valve so to test you can remove them and you should only be able to blow through one end.. if you can blow through both ends then it’s bad. Also there’s some vaccum lines behind the glove box and if those have holes in them it could cause the problem.
07-11-2024 | 02:09 PM
#6
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Joined: Aug 2012
Posts: 27
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From: Usa
Year: 1997
Model: Cherokee (KK)
Engine: magcek
07-15-2024 | 01:49 AM
#7
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Joined: Jun 2024
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It’s a one way check valve so to test you can remove them and you should only be able to blow through one end.. if you can blow through both ends then it’s bad. Also there’s some vaccum lines behind the glove box and if those have holes in them it could cause the problem.
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Last edited by JudithStevens; 07-22-2024 at 06:58 AM.
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