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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 DuvalHeating, Home Heating SystemsHeat Hot Water Light Boiler
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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Mend repair fix Saunier Duval home heating systems