If the blower doesn't work on A/C, vent or heat, it could be a few things: 1. Blower switch - $22 at AutoZone 2. Blower resistor - located on the passenger side under glove compartment 3. Loose wire to or from blower 4. Bad blower. 1 and 2 are the easiest to remedy, while 4 would be the most difficult.
a massive overload of that particular circuit... cheers Aussie charlie..........
blend door failure is a common problem on 97+ Jeep Cherokee
Can a 2004 Power Tech High Out Put Engine Fit in a 2001 jeep grand cherokee limited 4.7L v8
Bad thermostat
possibly blown head gasket
check pcv it maybe plugged
Most common problem is that the blend door is stuck or broken.
One of the reasons a 2000 Jeep Cherokee heater would randomly blow cold air and then hot air and then cold might be that there is a problem with the hot/cold duct. The air or a vent might be inadvertently blowing periodically.
more than likely the blower motor needs replaced
You may have a faulty expansion valve. It may prevent compressor from running long enough to cool your car.
I've had this happen to me as well. I had a 1998 ZJ Laredo 2x4. I found the problem was the PCM. After I replaced the PCM, no more problem.
There is a dead short to ground in the circuit.