Contenu
If the heater in your Grand Cherokee isnt working properly, several things could be the culprit. It usually isnt serious or tough to work out, but the heater core can be a chore.
Heater Core
If the heater core has gone out in your Grand Cherokee, the heater wont work. The heater core is a small radiator-type unit located way up under the dash area. The blower fan uses the heat created by this unit to blow hot air into the cab.
Coolant Level
Because the heater works directly off the engines hot coolant, if the system is low then no heat can be produced. If the blower fan turns on and you dont have any leaks under the dash of your Grand Cherokee, check the radiators coolant level and top it off if it is low.
Blower Fan
The blower fan is responsible for moving the heat from the heater core to the vents. If it is not working then your heater settings will not work. Check the fuse panel in the Grand Cherokee first, and if the fuse is okay then it may be the blower fan motor itself which has stopped working.
