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heater sucks

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Old Oct 25, 2011 | 09:50 PM
  #1  
cherokkee98's Avatar
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From: Pine Hill, NJ
Year: 1998
Model: Cherokee
Engine: 4.0
Default heater sucks

what's up everybody!! I need some help.. I just put a new thermostat in my jeep.. (98 xj) and it's blowin warm air out. I ex-changed the first thermostat because I thought maybe it was faulty.. but the 2nd did the same.. thanks in advance for ur help..
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Old Oct 25, 2011 | 09:55 PM
  #2  
Raffy's Avatar
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From: Lowell, Massachusetts
Year: 1997
Model: Cherokee
Engine: 4.0
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Flush your heater core. Or you have an air pocket
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Old Oct 25, 2011 | 11:56 PM
  #3  
Firestorm500's Avatar
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Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
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You should be using the stock 195 degree thermostat.

If you're not, you will not get good heat.
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Old Oct 26, 2011 | 08:40 AM
  #4  
turbo laser's Avatar
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From: Ohio
Year: 1998
Model: Cherokee
Engine: 4.0l
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Flush your heater core. I was having the same problem until I flushed it and I was amazed as how much stuff was hiding in it. After though my heat works like a champ
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Old Oct 26, 2011 | 08:45 AM
  #5  
Grip's Avatar
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From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
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I flushed my heater core last weekend.


Heat went from barely warm to blazing hot in a matter of 10 minutes with a garden hose.

Its easy, and free.
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Old Oct 26, 2011 | 09:10 AM
  #6  
SeriousOffroad's Avatar
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Model: Cherokee
Default

Are you certain that the blend door is functioning properly?

Check your linkage from the control panel to the door lever.
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Old Nov 5, 2011 | 11:36 PM
  #7  
cherokkee98's Avatar
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From: Pine Hill, NJ
Year: 1998
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still cant figure it out
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Old Nov 5, 2011 | 11:37 PM
  #8  
cherokkee98's Avatar
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From: Pine Hill, NJ
Year: 1998
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still cant figure it out
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Old Nov 5, 2011 | 11:38 PM
  #9  
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From: Pine Hill, NJ
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still cant figure it out
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Old Nov 5, 2011 | 11:38 PM
  #10  
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From: Pine Hill, NJ
Year: 1998
Model: Cherokee
Engine: 4.0
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oops sorry bout that. my computer is crap
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Old Nov 6, 2011 | 10:49 AM
  #11  
djb383's Avatar
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From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
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So, u did the flush, burped it, checked the blend door and made sure u have at least a 180F t-stat? When u did the flush, was a good strong stream of water squirting out a heater hose? 'bout the only thing left is a possible weak water pump
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Old Nov 6, 2011 | 10:52 AM
  #12  
cj's99xjsport's Avatar
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From: atlanta
Year: 1999
Model: Cherokee
Engine: inline 6
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When you flushed it , did you flush it opposite the way the coolant would normally go?
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Old Nov 7, 2011 | 12:50 AM
  #13  
cherokkee98's Avatar
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From: Pine Hill, NJ
Year: 1998
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it works!! I flushed it again today.. I put some blue devil sealant in it and it works now!! I must have a leak somewhere.. which worries me cuz it mite be a head gasket..
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