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Mend Alpha Heating CB33 Boiler Red Led

alpha HE CB33 Boiler runs for about 30mins fine then fails to light?

Red led light flashes on and off, manual says this means overheating?
any suggestions

stuart
February 2012
Alpha HeatingAlpha Heating CB33Heating, Home Heating SystemsBoiler Red Led

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Alpha HE CB33 Boiler - Overheating Issue