Mike, I go through this a lot trying to explain: How the cooling fans cycle with the AC on How the cooling fans cycle without the AC on. How the weather affects the cycling How the blower speed affect the cycling How the sensitivity of the otterstat How the circuit breaker reacts. How the low and high pressure switches affect the cycling How the Freon level affects the cycling It would be a rather long post on the DML if they don't mind and maybe other's will benefit from it also. I have also thought about writing it and sending it out with parts in the circuit as people buy them. But, In a nut shell: The circuit breaker is a big culprit. With the New Fan Fix Dual 2 X 2. I eliminated the CB in the wiring and my fans cycle very little as long as the freon level is ok. With the Dual 2 X 2 you can tell if your low on freon.. Most of the time I can drive in 80 to 90 degree weather and the fans never come on. Then when I turn on the air, I can effect the cycle time by how fast the blower motor is turning in relationship to the temperature outside. It all works like a clock. John Hervey http://www.specialtauto.com/