Question about 2003 Jeep Grand Cherokee

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My air conditioning will go in and out when used during the summer. The same thing happens when the heater is used during the winter. I have had it looked at by the dealer and spent $$$ to fix it, yet it continues to do the same thing.

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  • 64 Answers

1st check the control switch on dash,it maybe defaulting-2nd check out blower motor fuse-3rd check the blower motor itself it located underneath glove box-hope that helps,good luck!

Posted on Nov 05, 2010

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Posted on Jan 02, 2017

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The defrost on a car works by using the A/C to remove the moisture from the air (thereby lowering the relative humidity)
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Air conditioning


sounds like the linkage in the dash controls are backwards or mislabeled relay was put in vehicle which has opposite properties of which your describeing
locate the control relay and or linkage check this first then replace the control relay cause during the cold months the relay freezes open or shut and then when moisture disapates is creates rust in the relay which gives it a bad point making things reverse

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