It is probably low on R134 refrigerant, compressor clutch may be going out also but it is most likely in need of a recharge.
A 2000 Jeep Cherokee would have rear drum brakes.
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.
Check your fuses
what kind of oil does my jeep cherokee 2000 need?
That would depend on the size of your camper. I have a small pop up camper and used my 2000 Jeep Grand Cherokee (V6) to tow it from Chicago to Yellowstone and back. I will never do that again. I now have a 1995 Grand Cherokee (V8) that tows it with no problem.
faulty throttle position sensor?
Your 2007 Jeep Grand Cherokee 16 inch aluminum wheels will fit on to the 2000 Jeep Cherokee Sport. Any wheel larger than 16 inches will not yet on to the 2000 Cherokee.
Low oil level, failed oil pressure sending unit, plugged oil filter, internal engine problem.
Child safety latches engaged?
1996-2000 Cherokee.
how to install a fuel pump on a 2000 jeep Cherokee 6 cylc
There wasn't a 2003 Cherokee. The last Cherokee was 2000.