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Rick Ridley
Rick Ridley, UK Heating Engineer
Category: UK Plumbing
Satisfied Customers: 1561
Experience:  30 Years on the tools, now retired, Ex CORGI
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I have a ferolli optimax HE plus 31c boiler, which isn't

Customer Question

Hi, I have a ferolli optimax HE plus 31c boiler, which isn't working, it's flashing up orange with an F then the number 37
Submitted: 1 year ago.
Category: UK Plumbing
Expert:  Andrew Smith replied 1 year ago.

Can you confirm the system pressure?

Customer: replied 1 year ago.
It is sitting just under 1
Expert:  Andrew Smith replied 1 year ago.

Can you take it put to 1.5 bar and see if works, it may be a faulty gauge?

Customer: replied 1 year ago.
How do I do that?
Expert:  Andrew Smith replied 1 year ago.

The 2 levers under the boiler - there is one on the cold and another on the heating pipe.

Do you not have the instructions?

Customer: replied 1 year ago.
but finding them difficult to follow. I can see a red lever, yellow lever and 2 blue levers
Expert:  Andrew Smith replied 1 year ago.

Try the 2 blue ones, one first then the second one to see if the pressure starts rising. Turning them in line with the pipework turns them on.

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