Best place for efan thermoswitch

[JustJeff]

Originally Posted by FerociousP

It will be cooler... how much, I don't know.

I used the thermoswitch location on the back of the waterpump using a NPT adapter for my gauge. It isn't the ECU temp sensor. Mine is s5 turbo, so I don't know if your specific model has it or not.

FYI it is a one pin sensor and goes to ground at 207*, which you might find suitable (normal operating temp is 185-195ish)

I thought the same type thing and was just looking at that page to find when it switched.

My question is I want to keep my A/C. Am I correct that the OEM purpose of that switch is for an a/c efan and also to bump up the idle when the a/c is on? Can I simply splice into that wiring, use a relay to switch polarity and have that sensor do it's OEM purpose and kick on my efan?

My other question is that my Summit switch matches the diameter of the OEM switch but the threading is different. What about retapping that spot for the Summit switch and using the 200 deg switch to do both OEM and radiator efan? Can I use a relay to switch polarity to ground and have to go to my engine harness then also have the signal go out as intended to kick on my efan?

If everythign else in my post is correct and possible won't that have my idle kick up anytime either the efan or the a/c come on and also turn on the efan???