It's official - do NOT buy a Miata thermoswitch until you read this!
Originally Posted by powermalex
Thanks I just ordered it from the local dealer. $42.60
de doober
Joined: Feb 2001
Posts: 135
Likes: 0
From: Plymouth, Michigan
Originally Posted by DamonB
I know exactly bupkis about FC's but still wonder how it took so long for somebody to figure out the stock FC switch is a drop in replacement!
I wonder if I kept my stock connector when I cut it off to fit the Miata thermoswitch...
I wonder if I kept my stock connector when I cut it off to fit the Miata thermoswitch...
Senior Member
Joined: Nov 2002
Posts: 268
Likes: 0
From: Collegeville PA
I also just completed this mod today...and in the process had an intersting find...
the FD thermoswitch was not even connected!
that's right, the connector was just dangling back there in no man's land! this would explain why my fans didn't come on as often as i would have liked!
anyone have any tips for "feeling" proper belt tension. i see factory spec is .24 - .27 inches, but i am without a tool to test tension. i've pushed on the center of the belt and it seems to have about a 1/4" of play, but that seems highly dependant on the amount of force you apply.
anyone know the "standard" amount of force to check the play?
By the way, thanks for the great info on a fabulous reliability mod.
regards,
eric
the FD thermoswitch was not even connected!
that's right, the connector was just dangling back there in no man's land! this would explain why my fans didn't come on as often as i would have liked!
anyone have any tips for "feeling" proper belt tension. i see factory spec is .24 - .27 inches, but i am without a tool to test tension. i've pushed on the center of the belt and it seems to have about a 1/4" of play, but that seems highly dependant on the amount of force you apply.
anyone know the "standard" amount of force to check the play?
By the way, thanks for the great info on a fabulous reliability mod.
regards,
eric
Senior Member
Joined: Nov 2002
Posts: 268
Likes: 0
From: Collegeville PA
oh yes and a silly question, but when this switch was disconnected (prior to me doing the mod) what was responsible for keeping my car cool. I never had an overheat or any other issue...
thanks!
eric
thanks!
eric
Full Member
Joined: Apr 2010
Posts: 162
Likes: 0
From: Czech republic
hello,Yesterday I made the exchange with FC thermoswitch PN 41-18-840.
but the one I pulled not look the same as the new one.
The number on the old 15/12F/97M (also is scuffed Connectors, which is not my work
)
and the new one (PN 41-18-840) is wearing 9N/19/97M
It seems that the previous owner doing this before me? ... but the connector looks weird.
Now the new is installed and it works, but still... anyone know that original switch?
but the one I pulled not look the same as the new one.
The number on the old 15/12F/97M (also is scuffed Connectors, which is not my work
) and the new one (PN 41-18-840) is wearing 9N/19/97M
It seems that the previous owner doing this before me?
... but the connector looks weird.Now the new is installed and it works, but still... anyone know that original switch?
If the plug fits, and you got the right p/n you should be good to go. 
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