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Ariston Genus 27mffi will not switch off?

I have an Ariston Genus 27mffi combi boiler which will not switch off, the only way is to kill the mains to it.
Even on hot water only the heating stays on.
Chris Atkinson, November 2009
you have a faulty central heating temp probe, replace it and your boiler will be fine.

Ian Ditchburn, November 2009
link Click here to see other fixes for Ariston.