Mazda 929 Radiator Fan Switch Question?

to add, support (though a mastech needs no support),

there's way more to that circuit than just simple fan operation at a given temp. the a/c is in the loop as well. even though it's a temp switch, it can not be isolated/cut out of the circuit.

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FYI,

interum, whilst you order the correct 400~ dollar rad (last i looked it's only avail via the dealer), have you tried JB weld on the crack? stuff for steel not for plastic. plastic stuff may work. just haven't ever used it. my mothers 929 rad cracked as well on top. left of the cap bout 2" away. must be some what common.

drain collant, clean area w/alcohol, ruff up the area with a brass brush. clean again. mix the welder 60/40. light on the hardener. not too thick. and take it bout 1/2" beyond any damage. tappering thickness to it's edge. 24 hrs to cure. if after curing, if it cracked, you put on too thick of a coat.

iffin the crack isn't to big and not at the end caps, it should work.

that repair procedure is still holding my mothers 929 rad after 10 years.

i've done it (w/no garranties) for others who could not afford a rad. had no complaints so far. but i've been some what picky bout which rad i might suggest that be done on. i only do it on rads that have maybe 1"+- cracks~. and never when it involves an end cap.

every one i've done, being selective on which ones, have not failed yet. no neg customer feed back after 5-6 years of doing that. *selectively*. some are beyond that kind of repair.

memory serves, think the dealer price was closer to 600.

Take the POS radiator back and get the right one. You do something stupid like put a switch for the radiator fan on instead of doing it right and you will be replacing the motor next!!! Ya frickin hoo!!