Radiator fan won't turn on!
 

Hello, I have a 2000 Mercury Mystique gs 4 cylinder. The gauge will not move from cold. I have replaced the thermostat, nothing, I replaced the ENGINE COOLANT TEMPERATURE SENSOR, nothing.

I had it tested a while ago (two months) and the only code was a misfire, I replaced all spark plugs, wires, and the box. I never see the fan turn on when parked, yet it doesn't over heat. Any ideas?

Must be unfixable. I have NEVER been to a forum (with so called experts) and been given an answer, never. Not sure why expected a response now. lol