I am switching over my stock cooling fan on my FC to an electric one. I just bought the adjustable thermostat but the instructions dont say where to place the thermostat probe! Where is the best place on my radiator for this???

 

waterpump housing.

 

Nearly anywhere on the radiator is fine. I just zip-tied mine to the surface. Also, you can jam the probe (carefully) in between the fins. Closer to the right side (where the water enteres) is best.