Question about 2002 Mazda MPV

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My fans stay on all the time even if the temp is not high i have a mazda 2002 mpv lx dont know where the fan switch is located i think is bad

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On most vehicles there is a sensor screwed into the head which sends a signal to a relay which puts power to the fans. there is not a "switch" you can turn off. look in your manual for location of the fuse panel. as a 1st step, read the legend inside the panel lid, find the fan relay and replace it. if that does not do it then you are going to need to buy and replace the sensor. if that does not do it then you are going to a dealer for an electric system diagnosis by someone who works on this car all the time.

Posted on Mar 23, 2011

  • ddd1409 May 19, 2011

    The 2002 and later MPV only have one temperature sensor so if your gauge is reading normal it would rule out the sensor. Suspect the fan control module first. This module/control unit is located on the fan shroud so as to be cooled by the fan operation when runnning. It is a smallish black box with silver on one side and bumps for heat sinks. A light tap with a screwdriver handle will often change fan operation indicating a faulty module. The module was recalled by Mazda many years ago but the replacement part was not much better than the old recalled part!! Symtoms of faulty module were typically erratic operation of fan but also sometimes running all the time or not at all.


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