Date registered: May 2003
Vehicle: 2012 Focus SE
Location: Ormond Beach, FL
Mentioned: 1 Post(s)
Quoted: 69 Post(s)
I assume you meant the thermostatic switch that goes on top of the engine, ahead of the idle control valve. It's also called the 212 switch. Guess why.
If the aux fan doesn't come on at all, I'd check if once past 90C, the electrical plug for the aux fan is getting juice. If not, check: 1) the fuse, 2) the relay.
Felicita e un bicchiere di vino con un panino.