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isotwin condens f 35 e service menu codes?

Hello,
My gas boiler Saunier Duval ISOTWIN CONDENS F 35 E consumes too much gas. I ask for help in obtaining service instructions for this boiler. I am interested in a detailed description of all service menu codes "96" (1,2,3 ... 22) and "35" (23,24,25 ... 36).
Andy.
Thank!

Andy.
November 2019
Are you Gas Safe certified?

If not, leave the thing alone and get it serviced by someone who is certified.

afjsaj
November 2019

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