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Unread 09-07-2013, 07:15 PM   #1
bear1960
Registered User
 
Join Date: Sep 2013
Location: pawcatuck, ct
Posts: 4
heater

My heater was working great but now it only shoots heat out of the defrost vents. Nothing comes out of the floor or the vents on the dash. I have no idea whats going on. I can flip through every setting and it always shoots out of the defrost vents. Any ideas.

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Unread 09-07-2013, 07:31 PM   #2
hpservertech
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1994 ZJ 
 
Join Date: Sep 2013
Location: St. Louis, MO
Posts: 24
Had the same problem. Replaced the temp control and problem was solved. It is either that or you have a vacuum leak.
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Unread 09-07-2013, 08:33 PM   #3
JasonStebbins
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1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Do you have digital or analog climate control?

Most likely a vacuum leak under the hood. Especially check the "T" near the firewall.
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Unread 09-13-2013, 06:30 PM   #4
bear1960
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Join Date: Sep 2013
Location: pawcatuck, ct
Posts: 4
vacuum leak near firewall plastic tube broken now switches from dash or heat to defrost under power acceleration then back when let off gas
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Unread 09-15-2013, 07:08 AM   #5
congerz83
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1996 ZJ 
 
Join Date: Jun 2011
Location: Congers, NY
Posts: 345
Same problem and solutions found here


http://www.jeepforum.com/forum/f13/h...ation-1458659/
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