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Mend Saunier Duval 623 Combi Hot Ignition

Saunier duval 623 combi not igniting?

No hot water or heating. When I press the ignition button it fires into action but goes off as soon as i take my finger off the button. Any ideas please?

Chris.
November 2008
Saunier DuvalSaunier Duval 623Heating, Home Heating SystemsCombi Hot Ignition
you need to replace the thermal couple

Rod
November 2008

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Saunier Duval 623 Combi Not Igniting - Fix