Posts by Jamie

D1 on a Worcester Bosch is a return sensor fault: the boiler can’t get a sensible reading from the sensor that measures water coming back from your heating system. We’re…

C6 on a Worcester Bosch is a fan fault: the fan that pulls air through the boiler and pushes exhaust gases out isn’t running at the speed the boiler expects,…

E9 on a Worcester Bosch means the water in the boiler got hotter than it should, so a safety limiter tripped and shut the boiler down. We’re Clever Energy Boilers:…

An A1 on your Worcester Bosch is a pump and water fault: the boiler has detected that the pump is stuck, running dry or working against air, and often that…

A D5 on a Worcester Bosch usually means the condensate is not draining away properly, and on most boilers that comes down to a blocked or frozen condensate pipe. We’re…

An FA on a Worcester Bosch display means the boiler still senses a flame after the gas valve has closed, which is the sort of fault that deserves a careful…

If your Worcester Bosch is showing 229, it has lost its flame partway through a heating or hot water cycle and shut down, and in cold weather a frozen condensate…

Code 228 on a Worcester Bosch is the odd one out in the flame family: instead of failing to find a flame, the boiler believes it can see one when…

A 227 on a Worcester Bosch display means the boiler tried to light, waited for a flame signal and heard nothing back, so it shut itself down to stay safe.…

If your Worcester Bosch boiler is showing an EA fault code or EA error code, it usually means the boiler has tried to fire up but hasn’t detected a flame.…