Ok, if you disconect the wire from the thermoswitch and the fan turns on that means the switch its not "sensing" the temperature, everything else its working the way its supposed to.
Did you "purged" the air out of the system?
I mean, it could be a pocket of air in the system and the thermoswitch didnt work with hot air, it needs "hot water' to open.
Disconect the top radiator hose (from the radiator) and pour on it "hot water" to open the thermostat and let the air out of the engine.
I m sorry if I insist but I really think that the problem its there.
Let me know!
Monday, February 11th, 2008 AT 10:30 PM