well i got the driver side one. it comes on when i show 200 CHT on my gryphon, i was then wanting the second one to come on at 210 CHT. however, i can turn the dial all the way around and it never turns on. the only time it turns on is when i press the a/c button which it should because i have it come on whenever i have the a/c turned on.

its just if the CHT got above 210 the second fan wont turn on unless the a/c gets turned on

thats what is puzzling me

well think you might have a problem if you can turn the screw a full 360 degree it is only supposed to go 3/4 of a full turn. think that might be your problem as you may have stripped that lil screw for the controller. that is werid as when my truck hits a certain temp both fans kick on. i see what you are saying. only thing i can think of is double check the wiring. and make sure all connections are good and solid.

ok so ive been playing around with it for awhile now TRYING to get the first fan to come on at 200 CHT but it never seems too until about 208-210

the second one i still cant get to come on at a higher temp.


i had guys on f150online tell me to go by the ECT because the t-stat opens at 195 and when i set the fan at 200 for the CHT the ECT is always at about 194.


should i change it so i try and get the fan to come on at 200 ECT??

also the temperature probes, could they be doing this? one of them is a little bit loose but only if you pull it. the other one is better