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Jeep Grand Cherokee Heater Problems

by Derek Odom

If the heater in your Grand Cherokee isn't working properly, several things could be the culprit. It usually isn't 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 won't 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 engine's hot coolant, if the system is low then no heat can be produced. If the blower fan turns on and you don't have any leaks under the dash of your Grand Cherokee, check the radiator's 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.


About the Author

Derek Odom has freelanced since 2008 and is also an author of the macabre. He has been published on, and various other websites. Odom has an Associate of Arts in administration of justice.

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Photo Credits

  • car heater vent image by robert mobley from