Central Heating coming on when turned OFF?

[jennind]

Hi Folks,

I've got a Worcester Greenstar30Si combi boiler and I have noticed that the central heating appears to be coming on even though it is set of OFF at the Programme.
It's the middle of summer so it was strange to feel the radiators warm. It seems to be when I run the hot water the radiators also warm up?

Do you have any idea what might be wrong & what's needed to fix it?
Is this something easy for a DIY'er to change?

Thanks!

 

[nortonj]

Is your hot water performance affected?
Possible divertor passing

 

[jennind]

Hi there,

The hot water seems to be working as expected.
It's a pressurised system & I've double check the boiler pressure.

If it is the divertor then is it a DIY'able job to replace?
I've turned the TRV of all the radiators off to avoid the problem at the moment

Thanks

 

[bellairaphon]

No not diyable as the outer case seals the combustion chamber.

Nath

 

[nortonj]

As above, call somebody out