Aaron, It sounds like you still have an out-of-range otterstat (or fan switch as you call it). All otterstats are not made to come on at the same low temperature. The original one on my car does not come on until the 220 degree mark. The new one comes on at 180 degrees (If I remember correctly.) Try this: take both your old and new otterstats out and drop them in a shallow pan of water with a thermometer and boil them one at a time on the stove to see what temperature they switch at. You should hear a little click when they switch, but it helps to hold onto them with the alligator clips from a continuity meter. Your cooling system will run at least as hot as the otterstat dictates. Walt Tampa, FL -----Original Message----- From: aaron_t_graham@xxxx <aaron_t_graham@xxxx> <snip> >The cooling fans come on when the A/C compressor is on, and when I >short the fan switch wires together, the fans are on constantly. >Thinking the fan switch would be the only thing left to replace, I >installed a new one. This, also, did not solve the problem. > >I have now hit a brick wall. <snip>