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saunier duval 620f?

Can anyone help i've just changed the fan over on my boiler but now i can't get the pilot light to stay alight, any ideas.
neil horsfall, February 2008
hi mate check the air flap 99% of time on duval it that regards lee 07751346520

lee, January 2010
The obvious fault is the thermocouple.Providing the tip of the thermo is correct. The boiler will not work with the silver front off, just a thought.

bendan, March 2008
link Click here to see other fixes for Saunier Duval.