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Mend Ferroli 77FF Chamber Air Pressure Switch Exactly

How can i fix my ferrolli 77ff?

There is a chamber above the air pressure switch which has a domed plunger which looks as if it it lifts up and down. what exactly does this do and could it contribute to the pressure switch not getting enough air to open it ?

ken
March 2008
FerroliFerroli 77FFHeating, Home Heating SystemsChamber Air Pressure Switch Exactly
this resets your over heat stat

paul
March 2008

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