Engine compartment fan odd behaviour

[spud99]

I have an 06 C2S that has lately developed an increasingly odd behaviour in the engine compartment fan. Often the fan will come on for a couple of minutes, shut off for about 20 seconds and then come back on. This happens regardless of ambient temperature (-10C to +10C) It comes on when highway driving or around town. It generally runs when the water temp is about 80 and and the oil temp is about 90. Sometimes when I shut off the ignition and restart, the fan will not come on for some time. Any ideas?

Spud

[Loren]

There was a firmware update that fixed some fan problems - check to see if that was done.

Also, check to see that the sensor has not fallen out of its holder and is laying loose.

[spud99]

Thanks Loren for the speedy reply. Any quick tip as to the position of the sensor? I'll also phone the dealer to see if the firm ware was updated.

Spud

[Loren]

The sensor sits in a metal bracket that holds it.