Question about 1997 Jeep Grand Cherokee
1997 jeep grandcheroke, car overheat when using a/c.
First, if you have an electric fan in addition to the mechanical one, make sure it comes on when the a/c is on. Next, make sure that you have exactly 50/50 antifreeze mix (check with a cheap tester). Also check that you have the proper pound rating cap on the system. An incorrect cap will often work when not using the a/c but with the additional load, the system runs hotter and that's when the cap becomes very important. If correct, make sure that the seal on the cap is good.
Jeep radiators are marginal in size, nearly too small. If you have any leaves or bugs packed in front of the a/c condenser or between the radiator and condenser it will restrict air flow and make heat transfer inefficient. Make sure air flow is not blocked. Any internal calcification of passageways inside the radiator can do essentially the same thing (requires a good flush, sometimes replacement).
One or more of the above should help you.
Posted on Jul 17, 2010
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Posted on Jan 02, 2017
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