How can I change the external temperature display from farenheit back to centigrade following a service

My 60-plate Vauxhall Insignia 1.8 went in for a service, and when I got it back, the external temperature display had started reading in Farenheit (previously it was in centigrade). Does anyone know how to change it back?

It isn't apparent form scrolling through all the menus.

Asked on 15 December 2012 by Ian Hart

Answered by Alan Ross
Unfortunately we do not have that level of information Try posting it in the Technical Matters section of the Backroom forum where someone may have experienced a similar problem and can shed some light on a possible fix:

honestjohn.co.uk/forum/threads.htm?f=4
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