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Mend Horstmann H37 Home Heating Systems

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Mend Horstmann H37 Displaying Time Boiler

horstmann channel plus xl h37 displaying "?" Beside time?

Hi my horstmann channel plus xl h37 boiler control is displaying a "?" Beside the time when I put it on, does anyone know what this means or what it is doin when I hit the heating on

Dave
November 2016
HorstmannHorstmann H37Heating, Home Heating SystemsDisplaying Time Boiler

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