Car running sluggish and fan seems to work when it wants to so car overheating no warning lights are on.
Jul 18, 2016 at 2:49 PM
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RIVERMIKERAT
CERTIFIED EXPERT
6,110 POSTS
Check the fan relay, the engine temperature sensor, and the thermostat. With the engine cool, open the cooling system fill and see if there is coolant flow. Also check the color and texture of the coolant for the presence of rust.