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Mend Saunier Duval Home Heating Systems

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saunier duval thelia 623 boiler ?

fan runs on saunier duval thelia 623 but no heating and hot water

BRETT
November 2010
Saunier DuvalHeating, Home Heating SystemsBoiler Fan Runs Hot
carefree's right but check front case to burner/heatexchanger is sealed fully (location lugs on top clips on bottom-seal rubber okay. any air leak and air pressure switch which sences a vacum in boiler just won't

deano
November 2010
Probable air pressure switch failure

Carefree
November 2010

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Free repair help for Saunier Duval home heating systems