Question about 2003 Mazda Protege

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Temp gauge reading high

My wife noticed the high temp and turned the heater on. This lowered the temp immediately. I checked it out and there is no fluid loss in either the radiator or reservoir. The fans were running when I checked. My guess is the thermostat but I would like to check the sensing unit and fan relay. Is there an electrical reading I should see at either place?
Mazda Protege LX 2003

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  • NurseHimes Jan 02, 2009

    was this the thermostat this happened to me on Christmas eve have not been able to get help with yet

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If the fans are running and there's no blockage in the system, my first guess would be the thermostat too.

Look HERE for a link to a couple of circuit diagrams. Good luck.

Posted on Nov 22, 2008

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