I would suggest replacing the heater core only if you have a puddle of coolant on the passenger side floorboard. More likely the problem is with the blend door not directing air through the core. This is a very common failure on the GC. Check the web site at heatertreater (.net) for diagnostic procedures and a cheap, easy fix.
No, the entire dash has to be removed.
There is a resistor pack operated by the fan switch. It has failed. You need to replace it.
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1999 2.4
gen1 and gen2 grand Cherokees 93-04. there are a few different engines
i need 2 no how
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The blender doors could be a possiblility. Jeep Grand Cherokees have a faulty blender door that breaks easily and doesn't distribute heat evenly, therefore, causing basically no heat. The cost can be very high, since the dash has to be taken apart. Approx. $800.00
i broke down and paid to have this fixed. My mechanic said this is a fairly common problem on the older grand prixs. He had to replace the relay as well as the blower motor, total cost was $400.
Inside the vehicle in the middle of the dash at the bottom...........