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- Dec 8, 2005
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i have a vailliant ecotec 831 boiler installed in august 2012 , out of warranty now, during that time has been repaied twice under warranty for faulty diverter valve, now i get f28 and f54 code together, from what i managed to find out f54 refers to models 2012 onwards and f28 gas related issues..gas meter fine as cooker is working ok..had a a gas safe guy look at it..said it was gas valve gone in my boiler...didnt give me a price but not looking forward to it...they dont make them like they us to do they..only 6 years old and serviced reguarly..ffs.!