ferrolli

[cowboydave]

I have got a ferrolli falcon II the problem is that everytime i turn it on at the timer it turns on the central heating if i open a tap the boiler switches to hot water but when the tap is closed it switches back to central heating I assume that it is the timer that is broken but i do not want to buy one if it aint does anyone know how to test it
it may also be overheating as it also makes a banging noise on the return circ i have checked the pump and it is fine the air release valve was stuck but is ok now

 

[kevplumb]

the problem is that everytime i turn it on at the timer it turns on the central heating if i open a tap the boiler switches to hot water but when the tap is closed it switches back to central heating

it's supposed to

 

[cowboydave]

even when the timer is set for hot water ?