First of all you haave a super old car second i recomend you get to a auto repair before you get into any serious action
The heater core is inside the hvac housing behind the dash.
I also have a 2000 jeep wrangler. This year has a problem with the heater core plugging up. You can either try to flush it out, or just replace the heater core.
how hard is it to replace the heater core in a jeep liberty limated editon step by step instructions
The heater core is inside the hvac housing under the dash.
Jeep Comanche was created in 1985.
Thermostat and/or heater core may be defective
if you got antifreeze on your windshield when you turn the heater on, it's bad
Heater works fine in my Wrangler! Check the thermostat or the hoses or heater core might be plugged. The thermostat is easiest ^ cheapest to change so start there.
About $600
Yes
Do you live in an area that you need your heater?
Heater core may be defective