The seat temperature could either be too warm or cold. If the fan doesn't work on any position, it is the fuse. 2022 Jeep Grand Cherokee First Drive Review An American Classic Levels Up - Forbes Wheels Why is my heater not working? Why is my heat not working in my jeep grand cherokee . The fan works, but it seems the control switch from hot to cool is not funtioning. The 2014 jeep grand cherokee has 9 problems reported for temperature control is not working. If so.the drivers side air flow control unit on the heater assembly is not working. It may not be necessarily blown. Checked the inlet and outlet hoses and they are both hot.checked all the fuses in the power distribution box except the big ones that require a testing device.all the doors work as does the blower. 2000 jeep grand cherokee heater is not working fan is. Sounds like testing for power at seat switch is easier to do than get at these circuit breakers in the panel. Average repair cost is $700 at ...