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I have a 1998 ford contour that over heated 2 days ago. The low coolant light was on, the check engine light was on and the Temperature gauge was all the way past the red. I replaced the fluid and changed the thermostat. The engine light went off and so did the low coolant light but for some reason the temp gauge does not move. I heard there is a switch that I might need to unplug and plug back in but I do not know where to find it. I do not know what else I might need to do to fix the gauge. Thanks.

Answers from the Automotive Experts

Amanda J. Pierce, MBA Tired Mom, You need to have your coolant sending unit checked, which can be located around your thermostat. You may have had the sensor knocked loose while this was replaced prohibiting your gauge to work properly. Write back to AskPatty if you need further assistance after you have checked this sensor.

Audra Fordin, Owner at Great Bear Auto Shop Oh Tired mom, I totally feel for you and I get it! ME TOO! :) There are 3 possibilities I can think of, 1)The coolant temperature sensor, like you were saying. But it was working before you put the thermostat in right? 2) The thermostat you have installed is stuck open. 3) there is not enough coolant in the engine. check that too. Mechanically yours, Audra www.women AUTO

Laurie Sarno, Co-Owner at Super Girls Auto Hello Tired Mom- you probably blew out the sending unit or the gauge itself you - replace the sending unit first & then go from there- hope this helps- thanks Super Girls Auto.

Lori Johnson, Owner and Instructor at Ladies Start Your Engines Dear Tired Mom, If the temperature gauge doesn't move it may mean that the thermostat is stuck open. Or, it may be in upside down. It's important to install it the way it came out. If the problem is with the thermostat, you may also notice that it takes a very long time to heat the inside of the vehicle as well. It's also possible that the gauge is bad. Lori Johnson

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