Miata thermo switch
Miata thermo switch
the miata thermo switch activates fans at 210 degrees compared to stock 226. this looks like one of the best ways to keep the car cool. so why do i not find much about it? it would seem more people would go this route. from what i can find it is a direct replacement, just have to splice some wires, but i have been unable to find a definitive answer to whether it works for all years. the question was raised if it did, but not effectively answered. so i'm hoping someone can clear this up for me. it looks to be the best way from what i've researched, wondering why more people dont go this route. thanks for all help
Re: Miata thermo switch
Originally posted by Ward
the miata thermo switch activates fans at 210 degrees compared to stock 226. this looks like one of the best ways to keep the car cool. so why do i not find much about it? it would seem more people would go this route. from what i can find it is a direct replacement, just have to splice some wires, but i have been unable to find a definitive answer to whether it works for all years. the question was raised if it did, but not effectively answered. so i'm hoping someone can clear this up for me. it looks to be the best way from what i've researched, wondering why more people dont go this route. thanks for all help
the miata thermo switch activates fans at 210 degrees compared to stock 226. this looks like one of the best ways to keep the car cool. so why do i not find much about it? it would seem more people would go this route. from what i can find it is a direct replacement, just have to splice some wires, but i have been unable to find a definitive answer to whether it works for all years. the question was raised if it did, but not effectively answered. so i'm hoping someone can clear this up for me. it looks to be the best way from what i've researched, wondering why more people dont go this route. thanks for all help
I have one and will be installing it along with my rebuilt motor. Hopefully it works as well as it's supposed to. I don't see why people don't do this instead of other fan mods.
Originally posted by Alien7
Please post a how-to or write up or something......TIA!!!
Please post a how-to or write up or something......TIA!!!

1. Cut wires.
2. Take old switch out.
3. Put new switch in.
4. Splice wires.
Last edited by RonKMiller; Dec 15, 2002 at 10:27 AM.
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Wow nice write up on the how to. Kinda like replacing a motor,
Motor Replacement how to:
1) remove anything attached to the motor.
2) remove motor.
3) install new motor.
4) hook everything you took off back up.
5) easy as pie.
Motor Replacement how to:
1) remove anything attached to the motor.
2) remove motor.
3) install new motor.
4) hook everything you took off back up.
5) easy as pie.
I agree that the Miata thermoswitch is the best solution. I just put mine in and it's actually cool here in Dallas so I can't comment on max temps yet. The Miata thermoswitch directly replaces the stock one in the back of the water pump housing, only difference being that the connectors are different. The thermoswitch has a single male lug so I merely spliced a small female spade lug to my harness to wire it up. No trouble at all.
Here is the part number in this thread Miata thermoswitch (although I bought mine from the auto parts store for a little less money)
Here is the part number in this thread Miata thermoswitch (although I bought mine from the auto parts store for a little less money)
Originally posted by CantGoStraight
Wow nice write up on the how to. Kinda like replacing a motor,
Motor Replacement how to:
1) remove anything attached to the motor.
2) remove motor.
3) install new motor.
4) hook everything you took off back up.
5) easy as pie.
Wow nice write up on the how to. Kinda like replacing a motor,
Motor Replacement how to:
1) remove anything attached to the motor.
2) remove motor.
3) install new motor.
4) hook everything you took off back up.
5) easy as pie.
My somewhat sarcastic post should have been simplified even further to describe this very complex and daunting task: Do you know how to screw in a light bulb?
OR, how about this:
Q: How many "electronics technicians" does it take to change a light bulb?
A: Two! One to post the question and another one to open the beer!
Last edited by RonKMiller; Dec 15, 2002 at 08:18 PM.
works on many stock FDs, not all
Originally posted by RonKMiller
It works on all stock 3rd gens, do it. It is the way to go instead of screwing around with ALL the other other fan mods....just use some crimps and put some heat shrink tube around it. Simple is good.
It works on all stock 3rd gens, do it. It is the way to go instead of screwing around with ALL the other other fan mods....just use some crimps and put some heat shrink tube around it. Simple is good.
Quick test:
Switch has single wire to it, buried behind wp. Just ground this wire with ign on, eng cool ... if fans come on, then miata switch will work directly. If you have added 'fan mod' switch and enjoy on demand fan use with no delay, also good indicator miata switch works directly.
If u fail test, then your model's 226F fan switch circuit is looking for the 221F ecu based low speed trip to happen first. Work around concept is found at the voodooxxx link at cirian site, section on 'fan mod' switch.
Originally posted by DamonB
I agree that the Miata thermoswitch is the best solution. I just put mine in and it's actually cool here in Dallas so I can't comment on max temps yet. The Miata thermoswitch directly replaces the stock one in the back of the water pump housing, only difference being that the connectors are different. The thermoswitch has a single male lug so I merely spliced a small female spade lug to my harness to wire it up. No trouble at all.
Here is the part number in this thread Miata thermoswitch (although I bought mine from the auto parts store for a little less money)
I agree that the Miata thermoswitch is the best solution. I just put mine in and it's actually cool here in Dallas so I can't comment on max temps yet. The Miata thermoswitch directly replaces the stock one in the back of the water pump housing, only difference being that the connectors are different. The thermoswitch has a single male lug so I merely spliced a small female spade lug to my harness to wire it up. No trouble at all.
Here is the part number in this thread Miata thermoswitch (although I bought mine from the auto parts store for a little less money)

RonKMiller - lighten up buddy. No need to be a 16-year-old jackass. On the other hand, I welcome all sorts of constructive criticism.
Originally posted by RX7Elmo
isn't 210F a bit hot? I manually turn on my fans before it hits that temperature.
isn't 210F a bit hot? I manually turn on my fans before it hits that temperature.
Originally posted by fdracer
yeah, but i wanna get mine from an auto parts store not the dealear, so it'll be cheaper. wouldn't whatever brand the auto parts store uses have a different part #?
yeah, but i wanna get mine from an auto parts store not the dealear, so it'll be cheaper. wouldn't whatever brand the auto parts store uses have a different part #?


