HRM Wallstar Combi Oil Boiler, Hot water requires full flow

[Harleyjohn]

Hi all,

Looking for advise on Wallstar.

Hot water used to work when tap was turned on half but now it seems I have throw tap onto full to shock hot water into action or it will just flow cold.
I suspect diaphragm is getting worn, but if anyone out there in the know could help before I rip the boiler down I would be very grateful.

Thank you
John

 

[45yearsagasman]

Change the diaphragm for sure. Looks as if you only need to turn off the cold supply and remove the circlips to remove the two sensing pipes. Loosen the two grub screws holding the diaphragm to the diverter valve body. Protect electrics from water damage.

 

[Harleyjohn]

Change the diaphragm for sure. Looks as if you only need to turn off the cold supply and remove the circlips to remove the two sensing pipes. Loosen the two grub screws holding the diaphragm to the diverter valve body. Protect electrics from water damage.

45,
Thank you for the fast reply, I will get the diaphragm on order