A couple of weeks ago when messing aroundin my garage i accidentally knocked off the dial on my CH frost stat, I stuck it back on (Unsure of what way it was meant to go back on). But since then Ive noticed the boiler coming on at odd times when the HW and CH is switched off. I can only assume I altered the setting somehow but im not sure how the dial is meant to be positioned, its not very clear.
I have taken a photo of the stat and the dial :
Ta
Douglas