I have tried every frigging type of fan switch (thermal) known to man. 2 Hypertechs were bad out of the box. I'm waiting on a Derale (?) now, but it's back-ordered. What have you used that works, and turns the fans on at a reasonable temp?(170-180)

 

It's another temp switch used in another Chevy car. I for get the car and part number.. Sorry..