ferroli boiler. i cant get fan to run at full speed when calling for heat or hot water. and the only way to get burner to fire is breath down the air pressure switch. i have tried removing jp4 but to no difference. is a pcp as i dont want to fork out for one of those if it is only a sensor . many thanks

lee, February 2009

either your fan or air pressure switch gone m8 most props the fan isnt spinnin fast enough to create enough suction to make the air pressure switch.

nick, February 2009