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Old Dec 4, 2011 | 11:25 AM
  #1  
C barker 91xj's Avatar
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Default 91 xj

Wondering what it could be my heat isn't blowing through the vents this just happened yesterday and it sucks if anyone could help I would greatly appricate it
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Old Dec 4, 2011 | 11:50 AM
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From: DFW
Year: 1998
Model: Cherokee
Engine: 4.0
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Just to clarify, are you saying that the climate control blower comes on but the air coming out is cold? Or that the blower doesn't come on at all?

If the blower is working, I'd check your coolant first. If the coolant level is good, then it must not be flowing. Check this vid on the heater control valve:
That would be the next place I'd look. After that, I'd look at the water pump. Though if it was the water pump, I'd expect you'd know it was bad unless you only take very short trips. Good luck!
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Old Dec 4, 2011 | 11:42 PM
  #3  
C barker 91xj's Avatar
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Nah like it blows hot but only on defrost it want blow through the face vents lol sorry I didnt explain it better
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Old Dec 5, 2011 | 12:16 AM
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From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
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Check the vacuum reservoir behind the right side of the front bumper for cracks and if the hose is connected and check the small black vacuum line that comes out of the firewall near the A/C line connections to see if it is connected to its vacuum source.
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Old Dec 5, 2011 | 11:07 AM
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Ok thanks a lot is that located were the passages head light is?
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