no hot water

[hullabaloo]

You might be able to help with a problem that i have; -- With a 240x boiler the heating works fine, but the DHW is never hot enough even on the highest temp setting and slow flow rates. When the heating is turned off e.g. summer time when running DHW for a time the radiators warm up, The primary and DHW switches work correctly; Please help....

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Moderator

split from hijacked post

 

[oilman]

Diverter valve or secondary heat exchanger.

 

[ChrisR]

or both!