Question about 2003 Mercury Mountaineer
There could be a number of causes of a fluctuating temperature gauge but most commonly is the thermostat. It could also be a head gasket, cooling fan problem or the actual temperature sending unit. I hope this helps!
Posted on Jul 30, 2010
Testimonial: "Went to mechanic I usually use said ford explorer he has doing same. Will check w another guy to change thermostat thank you! : )"
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Posted on Jan 02, 2017
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