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Mend Saunier Duval SD 623 Boiler Thermostat

When heat in thermostate put two on , heating comes on for a while?

When heat in thermostate put two on , heating comes on for a while and when heatings on no hot water but pilot light is still on?

Boiler is saunier duval sd 623 boiler

Pat Hogan
December 2007
Saunier DuvalSaunier Duval SD 623Heating, Home Heating SystemsBoiler Thermostat Saunier Duval
The statement is confusing. It could be pump not running and the hot water switches nor working. The information is too vague

Alan Corbet
December 2007

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Saunier Duval 30 ESaunier Duval 30eSaunier Duval 623Saunier Duval F23ESaunier Duval F24ESaunier Duval F30ESaunier Duval F35ESaunier Duval ISOMAXSaunier Duval ISOTWINSaunier Duval SD623Saunier Duval Thelia 23Saunier Duval Thelia 23eSaunier Duval Thelia 623Saunier Duval Thema Condens F30E

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