Is there a fuse for the heater on a 2002 jeep grand cherokee ltd?

Check fuse and relay as mentions in the link. Also the BCM is involved with climate control in which case you will need an auto electrician with a pro grade scan tool computer.

https://www.google.com/search?q=2003+liberty+heater+fan+does+not+work


Relay 33 in the Power Distribution Centre

Fuse Box Diagram Jeep Liberty / Cherokee (KJ; 2002-2007)

https://fuse-box.info > jeep > jeep-liberty-kj-2002-2007...
Here you will find fuse box diagrams of Jeep Liberty 2002, 2003, 2004, 2005, 2006 and 2007, get information about the location of the fuse panels inside the ...

I would check the ignition switch, gently turn it right or left and see if those items come to life.

try the alternator

I had the same problem. It's the flasher relay under the dash way up at the top of the panel and a ***** to get at! I removed the panel. its about 1.5"x1.5" and has 9 blades. you'll know it cause its taller than all the rest. Some people say you can pop them open and resolder

Check the fuses for the overhead console, could be that if not then the console needs to be replaced.....

I have the same problem... If you have the auto climate control like I do there is a resistor at the bottom of the HVAC assembly right where the passengers foot would go. Be careful playing with these wires but you can wiggle them around and sometimes it worksish. But I've seen jeeps that the entire inside has burnt out because of that wiring. It is hard to find this part without going to the dealership stores say they can order it and then call later and say they cant. But you have to replace both the wiring and the heater resistor which will be a good days worth of work.

Youes probably begot a bad connection inside the fuse block. You can try cleaning fuse contacts with a really small nail file or something to re-establish contact.

your heater core is leaking its not fog on your windows its from the antifreeze having same problem so im replacing it myself but having problems getting the dash off its a head ache the heater core costs 91.99 at autozone i priced the job at a few shops and it runs between 7 and 900 dollars.good luck man

Here you can find about this info (in spanish language):
Heater and A/C - Jeep-WJ-2002-Cherokee-Service-Manual-PDF-24A-Calefaccion-y-Aire-Acondicionado
Wiring Diagrams - Jeep-WJ-2002-Cherokee-Service-Manual-PDF-08W-Diagrama-de-Cableado (page 221 and next / 8W 42-1)

Good luck!!!

try unhooking the battery to see if resetting the body computer helps. low batteries and poor connections at the battery can cause weird problems like this