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how to fix d1 error on a ferroli optimax he 31c boiler?

d1 error message keeps coming up after running hot water on a ferroli optimax he 31c boiler

eric
February 2011
FerroliHeating, Home Heating SystemsFerroli Boiler Running
d1 is not a error it is when the hot water has reach the correct temperature.you will also see d2 which is the central heating reaching temp.cheers

MARK
February 2011

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