Question about 1996 Jeep Grand Cherokee

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My heating blows cold after a couple of minutes????

Hi there i have changed the thermostat on my jeep now i have got good heat but i doesn't last long, i have to turn the temperature up because it blows cold after a couple of minute and i end up having it on 29 degree. is there a sensor that needs changing inside the car or is the problem somewhere else. when i do long distance driving i end up turning the system off to keep the bit of heat i get. please help

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I dosen't last long either...maybe it's catching!!! Was it making heat before you changed the stat? did you put it in the right way (spring part into engine) Try running it with the cap off and heat on high. there could be air in the heater. Also check that the electric fan is not staying on or coming on too early.

Posted on Feb 20, 2009


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Two things are happening.

The first is normal. Your heater gets its heat from the coolant ciculating in your engine. In order for it to work, the coolant needs time to heat up a bit. This is true of just about every vehicle.

When it gets cold again is the puzzler.

My advice is to check the coolant level in the radiator.

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