how can i fix my combi ferroli 77ff?

my ferroli 77 ff (12yrs old) has just stopped . i replaced the thermocouple started it up again and for acouple of hours was ok then i turned on the hot tap then it went off again the fan runs but gas burner doesnt light
john t, January 2006


done
ferroli 77ff ignition wont light

chris, November 2010
You might want to check the air pressure switch, make sure it isn't blocked and that the pin holes are clear

nick, March 2006
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