I would have to assume that you need to replace your thermostat. If the temp. gauge isn't getting very hot (around 190 degrees) after the vehicle has been runing for an extended period of time the thermostat is probably stuck open.
There are several things that can cause heater problems in your 1998 Jeep Grain Cherokee. The most common cause of heater problems is low fluid in your cooling system.
where is the ac drain on 1999 jeep grand cherokee limited
Yes
There wasn't a 2003 Cherokee. The last Cherokee was 2000.
If same engine and transmission models, yes.
Yes
No, too many were produced and it is not a limited production vehicle like the 1998 Jeep Grand Cherokee 5.9 or the SRT.
nope cant do it. no such thing as an 8.0 liter in a jeep
looking for a picture of where a tcm is located on a 2007 grand cherokee jeep limited
Do you live in an area that you need your heater?
No.
3574lbs