Question about 2003 Jeep Grand Cherokee

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Do not get heat inside the cab all the time - 2003 Jeep Grand Cherokee

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Change the thermostat flush the heater core by removing the hoses from the engine that go to the heater core and take a garden hose and run water through the core on the hose that comes off the thermostat housing til it comes out nice and clear. put back together fill with coolant. it is probably going to be rusty looking but you cant fix that.

Posted on Jan 03, 2011

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1 Answer

What makes the temp change from cold to hot inside the cab of the car?


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Sorry Ken, I have had that problem before on my 99 suburban and had to replace the heater core...Might check your thermostat first if you aren't getting any heat at all or very slight....Could also be an air bubble in your water line causing no heat to get through to cab...

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1 Answer

Warm air in cab but not getting the required heat . thermostat is good , core is new . but no inside heat


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1 Answer

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1 Answer

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1 Answer

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if the inlet and outlet hoses are getting hot to the heater core then the problem is the air temperture control blend door actuator in the heating/A/C ducts, this door directs air flow either across the heater core or the AC evaporator or mixes the 2 air flows for a desired temp at the outlets, hence the name blend door, to change this part u must remove the dash assembly.

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