thermostatic switch (to control electric fans) question???

[americanmusc1e]

I'm in the process of converting my truck to electric fans. I'm using the Altima fans from this FAQ http://67-72chevytrucks.com/vboard/s...ad.php?t=50085

I also bought a fan control kit from Summit http://www.summitracing.com/parts/HDA-3652/

I mounted the fans directly to the radiator and everything went good, I wired them up and tested them and I could activate the fans manually but I think the thermostatic probe/switch that goes into the radiator is not working, I checked the temperature right next to it using a food thermometer and it was 200*, but the switch will never turn on. it's getting power to it, but its just not working. I doubt I can send the kit back, I bought it a couple of months before I bought the fans.

Is there anywhere I can get one locally (radiator probe or coolant sensor)????

are there any oem applications for this kind of switch????