Radiators are hot when heating is off

[wanderingStar]

Hi there

Just wondering if anyone might be able help,

I have a suprima 50 boiler and the radiators were getting hot when the hot water was on.

I have recently changed a 3 port valve as this seemed stuck and thought this was the problem - but this did not fix it.

I am now looking at the timer switch on the wall as the next culprit , can anyone advise if this is the next step or if anything else might be worth a look

Many Thanks in Advance

 

[Boilerman2]

You have carried out the most likely repair, without sucess, I would suggest now would be a good time to get an Engineer in, as there could be many causes, that without seeing and investigating would be very hard to diagnose online