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Combi - hot water ok, but no heating

 
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Tapper



Joined: 19 Oct 2006
Posts: 1
Location: Lancashire
PostPosted: Sat Apr 19, 2008 4:37 pm    Post subject: Combi - hot water ok, but no heating Reply with quote
My boiler is a Worcester Bosch Highflow 400 RSF which provides hot water ok, but no CH, even though firing up and making the right noises. Previous posts about this kind of problem point to the diverter valve, so I stripped that down expecting to find a faulty diaphragm, but all seemed well. One thing though, I couldn't get a dc resistance reading though the coil although the control board is giving out 240v.

With your experience, would you still suspect the diverter valve? I also have water coming out of the expansion vessel air valve, so it looks like that's shot too! Any help would be much appreciated.
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AlanE
Moderator


Joined: 29 Jun 2003
Posts: 1132
Location: Colchester Essex
PostPosted: Sat Apr 19, 2008 7:09 pm    Post subject: Reply with quote
Doesn't faulty actuator spring to mind??

Yes expansion vessel is faulty.
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