Question about 1993 Jeep Grand Cherokee

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1993 Jeep Grand Cherokee. Heater core leaking, chk engi light on.

1993 Grand Jeep Cherokee. Heater core is leaking and the steam causes the inside of the windshield to fog. Turned on the defroster with the fan on high. Immediately the whole windshield fogged, so turned off the defroster. About a min later, the jeep started cutting out and was losing speed but then would be fine. Went on for about 10 miles then the check engine light came on. Why? Was not overheating, oil was full, had plenty of water. The jeep never completely died. Recently passed smog inspection. New catalytic converter. Check engine light stayed on. Why? The jeep backfired once, maybe twice.

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It sounds like coolant was also spraying the engine or something,but you need to have the codes read to know exactly whats going on.

Posted on Dec 26, 2009

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leo kowalski

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Just because you stopped the window from fogging it doesn't mean you have fixed the problem. The core is still leaking and causing other problems, you must change the core first then see which problems remain.

Posted on Aug 07, 2012

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2001 Jeep Grand Cherokee Heater


the heater core is removable from the climate control unit. The climate contriol unit has to be removed to replace it. The A/C system must be evacuated and lines removed as well as the dash, to access the climate control unit. The steam is coming from a leaking heater core.

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