Heat question
#1
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Year: 1988
Model: Cherokee
Engine: 4.0
Heat question
I replaced radiator this summer it has a new waterpump too sometimes the temp fluxuates from 210 to 225 or so . The other morning it was cold so I let it warm up. I go back out and its blowing cool air until I drive it it gets warm. Today at stop light it goes cool and I take off again it blows warm again. Any Input? Tstat? Core? Thanks guys!
#3
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Year: 1999
Model: Cherokee
Engine: 4.0
could be clogged heater core, could be blend door problem, the more you're on the gas, the less vacum the motor will make, check your vaccum canister too sounds like maybe it inst storing the vacuum properly.
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#8
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Heater blend door is cable operated so that's not it. If it were a vacuum issue all that would happen is the air would come out defrost and would still be hot.
Do you still have the factory heater valve in the heater hoses? It could be sticking closed.
Do you still have the factory heater valve in the heater hoses? It could be sticking closed.
#10
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
The heater control valve has nothing to do with open or closed system. It was used on both. Did you eliminate it in the process of converting?
#13
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Year: 1990
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You don't need it and that means something else is the cause.
#15
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Still have the original type closed cooling system with the bottle on the passenger side firewall?