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How to fix fault affecting Ferroli Optimax HE 31 gas boiler?

The F fault indicator signifying low pressure and failure on my Ferroli gas boiler Optimax HE 31C hasnow been on for 2 days

Roy Worsley
November 2009
FerroliHeating, Home Heating SystemsFerroli Gas Pressure
Same problem. Part D "Removable connection" is not connected and I'd say it never has since the way it's installed they can't fit it together. Boiler has worked for 9 months now.

I open both black valves and NO difference at all. Keep getting F37 error. What do you suggest?

Andoni
January 2010
It may sound simple Roy but have you opened the filling loop and topped the boiler up with water pressure to around 1 Bar? If this is the problem you should have a F37 code showing. If it's not this, then it's the pressure sensor. More than likely the low water pressure though.

Koppa Plumbing & Heating
November 2009

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