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home Fix label D.I.Y label_important Plumbing category Saunier Duval

SAUNIER DUVALL THELIA 623?

My Saunier duval boiler 623 is constantly fired up?
Would this be the thermostat?

Help as this is costing me alot in gas bills!
Debbie, February 2009
home Fix label D.I.Y label_important Plumbing category Saunier Duvaldone
Summer winter lever in the middle position. Only use in left or right .

BENDAN, July 2009
check thermister both may be not senceing temp. or if any frost stat built in it

Mr K, February 2009
link Click here to see other fixes for Saunier Duval 623.

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Fix Fault - D.I.Y

home label D.I.Y label_important Plumbing

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