Ice Detection

Has anyone had problems with the 156 ice detection warning system. Mine forgets to tell you that its got down to 3C most of the time when it should display on the dash every 20 seconds or so a frost warning. The dealer has no idea why anyone had the same fault?

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:<hr /><font size="1" face="Verdana, Helvetica, sans-serif">Originally posted by Carl Brackenbury:
<strong> every 20 seconds or so .....</strong><hr /></blockquote><font size="1" face="Verdana, Helvetica, sans-serif">That WOULD be a fault. If you need to be told when its icy......

well mine does it naturally like all others but so what if the temp is close to 3 what should i do .... wats that sign there for ?