Typhoon ZR Thanks for reply. I had previously set the fans for 180, then 160 and both worked,but sitting without moving for 5 minutes I find the fans recycling every few minutes. There doing what they are suspose to. It's just that I don't like the electric fans and since I can't use a mechanical fan I guess I'll have to pull the motor and relocate it farther back against the firewall to give me more room to use a mechanical fan..Bart