We have just moved into a new build and the installed Danfoss FP715 central heating controller doesn't seem to hold the programme that I set. I can set three programmes for the day for both Central Heating (CH) and Hot Water (HW). I set the heating to come on at 7.30pm and go off at 10.30pm, and this works for one day. Then when I turn the CH from Auto to Off the next day I come back to it, it has reset to the defaults. Should this behave like this or does this sound like a fault. If so I can mention to the builder and get it replaced.