Question about Hyundai Motor 2003 Sonata

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My car is running hot when it sits for along time and the air is on why?

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Coolant circulates at a much slower rate with the engine at an idle and the AC compressor does represent a substantial load on the engine causing it to produce more heat.
There is an extra fan which in most cars should turn on with the AC to help reduce heat buildup. You can check its operation pretty easy by opening the hood and watching the fan(s) while another turns on the AC and then off again. Obviously, keep your hands away from any fan even when not running since the operation of them is dependent on sensors that could decide to turn one on suddenly.

Posted on May 08, 2010

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6ya6ya
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Posted on Jan 02, 2017

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