Can someone please tell me what this is and where does it go? I found it just dangling around under the hood, so I taped it off to something so it does flop around.
Thanks!
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Volvo 740 GLEWhat is this thing???
Feb 22, 2006
4 Replies
That's the aux. fan thermal switch, it turns on the fan in front of the radiator if the coolant gets too hot. It goes where that hex plug in the radiator is right above the tranny cooling line. Normally there's a rubber fitting there it fits in.
Aha! Thanks!
Last I remember, there was a plastic plug seemingly screwed in that hole, as if it were removed on purpose.
Someone probably replaced the radiator and didn't have the right fitting to put the sensor back in. The original rads had plastic end tanks, the pipe fittings tend to snap off those when they get old, bad idea from the start.
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