Worcester 28Si II - CH Not Working!

[somnerd13]

Thanks. I've taken the control panel off and managed to remove the cap from the pump. A little bit of water came out then it continued to trickle lightly for a little bit longer. The center part of the pump seems to move fine so not so sure if it is the pump.

Also one thing I forgot to mention; if I run the hot water then of course the boiler fires up and continued burning. If I then turn the hot water off the boiler stays burning for a few seconds and the CH kicks in then the burner stops.

 

[Murf520970]

The boiler will light on max for hw & a lower gas pressure for heating so it may be a rectification fault, problem is the pcb,s also play up on these boilers, a gas safe engineer would need to repair it

 

[somnerd13]

Thanks.

Got an engineer coming tomorrow to look (hopefully). £60 call out fee but they're Worcester approved and I can't imagine I can get a diagnosis any cheap really.

Out of interest does this sound like it could be an issue with the motorised valve? I remember dealing with a similar issue in a relatives house years ago and the motorised valve was causing almost exactly the same thing to happen. I can't find the sodding motorised valve though!

 

[Murf520970]

theres no divertor valve inside . It has whats known as a bithermic heat exchanger so dosent need one.

 

[Casey744]

I know this thread is old but did you find out what was wrong?

I have EXACTLY the same problem! Any help would be really appreciated!