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Hi Any thoughts on rubbish Ferroli Optima HE 31 C?

First fault showing F37 open valve for pressure no sound left on for short period but closed off as nothing happened, then F40 came on and pressure is now climbing at 2 pressure is shut off, think must be faulty sensor but what do I do engineer not coming until Monday, will it be ok?

Jane
January 2015
FerroliHeating, Home Heating SystemsFault Open Valve

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