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How can i fix protherm 80 e?

the DHW is not working but heating is, hot water only availbe if heating already running

Paul
January 2007
Diaphram needs replacing.Its a large flatish washer in the valve assembly.They tend to rot.Common problem in combi boilers

Tony Davis
September 2007
Please help - does anyone have the technical helpline number for protherm?

AJ
February 2007
hi just had the same problem with mine and the gas man has repaired the fault ,it was a diaphram that was split .the diaphram controls microswitch for water

j c
January 2007
SNAP mines the same. from what i have read on other forums it looks like its one of three things.
thermistor
diaphram
or most likely the circuit board ( PCB )

warren
January 2007
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