coolant sensor or fan switch?
 

I have a '90 miata and on top of the thermostat housing there is either a sensor or switch that broke in half(don't ask:noob:). It has a 1-prong connector in the top of it but i lost that part(again, don't ask) so I don't know what it's called, help me out?

a temp sensor?

you sure?

Pretty sure that is the fan thermoswitch.

yeah, dont know the 1.6's that well, im pretty sure it just grounds the fan on at certain temp. aka thermoswitch as chad says

thanks i'm off to mazda tomorrow :)

Yup, fan switch.
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:werd: thermoswitch - dig into the switch top and find the lead, then solder a wire to it, and use a spade connector to connect the two wires.

N350-18-840, US dealer retail $45. No idea what it goes for in Canada, but as their typical custom, I'd expect a fair bit more.

I paid about 15$ for mine at an auto parts store, and yes its the thermo switch for the fans, when i got my car i never knew why my fans wouldn't go on lol, dont go to dealership they are a rip off try napa autoparts

lol same deal with mine the car came to me with no fans working unless i jumped the leads in the diagnostic box... actually only one came on so i guess i'm gonna have to replace that other motor... but yea $65 at mazda i checked canadian tire and we didn't carry and napa not in stock so i just figured i'd go today.

Another source for a part like that is at the Hyundai dealership. They use the Mazda motors in some of their cars and the parts are sometimes cheaper.

isnt the one a radiator fan and the other the ac fan? the other fan should come on when you turn ur ac on. if u want them to both turn on at the same time try this http://www.miatamx5.com/fans.html

oh thanks for the site well the guy i bought the car from ripped out the a/c compressor and now i have it in a box somewhere. but yeah i'll try that wiring thing