Cooling Fan Otter Switch

[460RedWedge]

I have a 350i with a 4.6 upgrade; the fan otter switch does not trigger until just over the mark above 90 degrees (which I assume must be 100 plus); this seems a bit on the high side, although it still copes fine even in very hot weather.

I have heard that the switch is from a Maestro - can anyone confirm this, and also whether they are still available (assuming that they normally trigger below this).

Gauge seems to read about right.

Not a major problem, as I have manual override, but would prefer correct automation.