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worcester bosch 240 combi?

when I demand hot water at the sink or shower, the radiaters get warm instead and little hot water comes
through
bryan, September 2008
Sorry I should have said diverter valve NOT 3port valve.
Sorry for any confussion.

Rupe, September 2008
Sounds like the 3port valve. I've seen it before and changed the diaphram washer but that didn't work. I had to change the whole valve in the end. They scale up inside and don't change over properly

Rupe, September 2008
link Click here to see other fixes for Worcester.