I appear to have a problem with the hot water only valve on my potterton boiler, Heating mode is fine and it warms the hot water but it is never fully hot. When switched to hot water only the boiler does not light up and consequently there is no hot water at all. Is there any easy solution to this or does it require a replacement valve?

Harry, December 2009

raul,
u prob got blockage.
prob dhw plate heat exchanger.
thats y it comes burner comes on & off.

FATGAS, January 2011

not sure if this might help, but i had a problem on pcb,and traced it to a faulty capacitor and changed it, but have 2nd fault same as you with hot water, noticed pump jamming and running slow, suspect restricting flow to heat exchanger, water ok if flow turned down,
going to change pump front with known good one, will post results.

paul, January 2010

I am having the same problem recently had boiler fixed changed diverter valve and pcb board everything was working fine until now and i am having problem with hot water, it is not hot enough and comes on and off heating on the other hand is working fine (Potterton performa 24)

Raul, January 2010

Mine is exactly the same. Could it be the cold weather do you think?

Siobhan Samson, January 2010