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Unread 11-23-2013, 06:54 AM   #1
Bain98xj
Registered User
1998 XJ Cherokee 
 
Join Date: Dec 2009
Location: howell
Posts: 395
Heat

Driving to work heat was working fine heard a snap then boom no heat. Anything to look for?

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Unread 11-23-2013, 06:59 AM   #2
streetglideok
Web Wheeler
2005 KJ Liberty 
 
Join Date: Jul 2011
Location: Colorado Springs, Colorado
Posts: 2,346
First thing, pop the hood, and verify the drive belt is in place and running all the pulleys. Next, verify your coolant level, and that it is full. Where abouts did the noise seem to come from?
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Unread 11-23-2013, 07:06 AM   #3
Bain98xj
Registered User
1998 XJ Cherokee 
 
Join Date: Dec 2009
Location: howell
Posts: 395
Belt is good coolant is full. noise seemed to come from right side of dash
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Unread 11-23-2013, 07:27 AM   #4
Bain98xj
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1998 XJ Cherokee 
 
Join Date: Dec 2009
Location: howell
Posts: 395
Also the blower motor is working on all speeds
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Unread 11-23-2013, 03:35 PM   #5
streetglideok
Web Wheeler
2005 KJ Liberty 
 
Join Date: Jul 2011
Location: Colorado Springs, Colorado
Posts: 2,346
Does the mode selection work, going from defrost vents, to dash vents, to floor?
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Unread 11-23-2013, 03:37 PM   #6
Bain98xj
Registered User
1998 XJ Cherokee 
 
Join Date: Dec 2009
Location: howell
Posts: 395
Yes the mode works if I keep moving the temp back and forth I can get heat but then it goes back cold.
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Unread 11-23-2013, 05:28 PM   #7
streetglideok
Web Wheeler
2005 KJ Liberty 
 
Join Date: Jul 2011
Location: Colorado Springs, Colorado
Posts: 2,346
Hmm, sounds like a problem with the blend door, or the blend door actuator. I can't tell you right off hand where it is, but it would be behind the dash, possibly viewable from under the dash. Would need to turn the temp control cold to hot, and back to cold while watching it, see what is happening.
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Unread 11-23-2013, 05:48 PM   #8
Bain98xj
Registered User
1998 XJ Cherokee 
 
Join Date: Dec 2009
Location: howell
Posts: 395
Thanks. Ill have to take a look and see what I can find. My understanding was that the temp door is on top of the hvac case. I can see it and feel it moving but I don't have full visibility. Appears that you have to drop the case to get it out if anyone has a different way to access or more info would be awesome
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