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Saunier Duval SD623 cant control heat ?

Hi my Sd 623 wont stay at temp set just keeps getting hotter . I have removed the room stat and bridged it so as to use the boiler stat but still the same .

Any ideas out there !!!!!

thanks for reading , hope to hear from someone sooon

Paul

Paul
October 2009
Saunier DuvalHeating, Home Heating SystemsSaunier Duval Sd623

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