Saunier Duval thema Condense F30E

Joined
12 Jun 2005
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United Kingdom
Having problems with this boiler and wondered if anyone has had similar.
Boiler works well in HW mode but Heating Flow pipe becomes hot and consequently radiators.
Divertor motor is operating when mode HW/CH mode is changed.
I have had the DV shaft out and cleaned and greased it.
The inner area of the Hydraulic Block looks clean with no obvious obstructions.
The DHW HE has been replaced on advise from Tech (as they said the are notoriously hard to clean sucessfully) but this has made no difference.
The next course of action is to remove the Hydraulic block, dismantle and clean through.
Am I missing something or does anyone have an answer a to what the probelem could be?

Cheers

Stinky
 
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