Defroster vents. -
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post #1 of 2 Old 11-06-2017, 12:21 PM Thread Starter
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1992 XJ Cherokee 
Join Date: May 2017
Posts: 4
Question Defroster vents.

Ok folks I need a little help diagnosing this one. It's a '92 XJ

I spent a lot of time last year fixing vacuum leaks all over the place. Finally it started reasonably fast and the climate controls all worked (Previously only had defrost because of the leaks)

Fast-Forward a year later:
Now all of a sudden it's taking longer to start and I'm having the opposite climate control problem. Everything works EXCEPT defrost.
I was in a rain storm the other day and my windows were so fogged I almost crashed.
I finally got under a gas-station canopy and disconnected the vacuum line to the climate control because I knew it defaulted to defrost. That worked, thank God.

I'm not really sure what could be going on here. Why would everything work except defrost?

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post #2 of 2 Old 11-06-2017, 09:00 PM
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1992 XJ Cherokee 
Join Date: Feb 2016
Location: Apache Junction
Posts: 26
I know the "defaults to defrost" well, but when the only one that doesn't work is defrost is a new one for me. My first thought may not be a fun one, but it may be a blend door that is not operating properly. I had to replace one on my Ram, and it was a pita. I'm curious to find out what you other guys think...
AZGLENH is offline  

climate control , defrost , defroster , leak , vacuum

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