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Mend Saunier Duval Home Heating Systems

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Mend Saunier Duval Hot Water Heating

Saunier Duval SD623F?

How can i fix my Saunier Duval SD623F/VF

It does neither get hot water nor heating. It seems that the primary high voltage powercircuit does not supply power to the transformer to get the 24V for the gas valve.
If high voltage power is supplied to the transformer the 24 circuit works correctly.

Uwe
September 2008
Saunier DuvalHeating, Home Heating SystemsSaunier Hot Water Heating
Check contacts on supply plug at rear of jig

BENDAN
September 2008

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