Simi super 90;central heating yes-DHW almost

[gnvqsos]

I have a Simi super 90 which has been excellent-two minor repairs in 10 years.The central heating is fine but the DHW is lukewarm when drawn from a boiler on winter setting ie when centralheating operating.When heating off the boiler does not fire up.I imagine there is a fault with the divertor valve.
I have some good gas engineers to contact but wiould welcome any advice so I can get the necessary parts in advance.

 

[superdupergasman]

Sounds like the diaphramn in the divertor valve has perished. have a look to see if the pin is coming out the top and making the micro switch. if not then thats what it will be.

Get a service kit for the divertor and it should solve your problems.

 

[gnvqsos]

Thanks superduper for your advice.I will order the servicing kit for my friendly fiiter to use.We have two good parts stockists here in Sheffield-do you have a parts number?
Thanks again for your prompt reply

 

[gnvqsos]

Update:kit £15 + vat.Corgi pal popped round took over an hour to sort due to tough unions(compression) and poor access.Done and dusted-thanks again superduper