Bad thermostat
Most likely a broken blend door. Check heatertreater.net for diagnostic information and an inexpensive fix.
possibly blown head gasket
The HeaterTreater is an after market kit that solves heater and AC for the Jeep Grand Cherokee and Laredo. It is much cheaper than the dealership fix and is easy to install. For diagnosis and info, check out www.heatertreater.net or search eBay for "heatertreater".
Can a 2004 Power Tech High Out Put Engine Fit in a 2001 jeep grand cherokee limited 4.7L v8
There is a dead short to ground in the circuit.
A short in the brake light circuit.
You may have a faulty expansion valve. It may prevent compressor from running long enough to cool your car.
The HeaterTreater is an after market kit that solves heater and AC for the Jeep Grand Cherokee and Laredo. It is much cheaper than the dealership fix and is easy to install. For diagnosis and info, check out www.heatertreater.net or search eBay for "heatertreater".
If it was rebuilt wrong, Yes
a stuck rely. and some time spring in the button on steering wheel gets stuck too
Most common problem is that the blend door is stuck or broken.
This has to do with a faulty "blend air door" which can get stuck in the wrong position. Fixing it requires pulling the dash and replacing the entire sub-assembly. It's expensive, approximetely $500 at most Jeep dealers. As of 01/2004, Chrysler has released an improved set of parts which should be more reliable.