In message , Howard Lambourne
writes
When I press the central heating button everything is fine ,but, when I
press the hot water button the heating turns itself off,, I press the hot
water to off again and the heating comes on again.... whats wrong??

Well, for a start, for someone who should have a clue (from your email
address), you've not given much useful info for anyone to go on

What central heating button, what boiler ?

define and explain your problem so that someone outside of your head
can understand what you're on about

--
geoff