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I think that alot of the 2.0L zetecs do the same thing. My fan comes on when it gets on the A. As long as you are in between the lines, it is not overheating. Some people have put manuel switches on so they can control when their fan comes on. Also if you feel it is hotter than you like, cut the AC on and both fans will come on.

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Q: Why would the engine be running hot on a 1998 Mercury Mystique 2.0 even though the thermostat heater radiator fluid fuses and relays all look good?
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