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Mend Main Eco 24 Boiler Combi Heating

no hot water upstairs?

when i turn on the shower or bathroom tap, the water is cold for a minute, then quite hot for a minute, then runs cold continuously. i have a main combi 24 boiler -installed 2 years ago. any idea what is wrong?

gwyn
January 2009
MainMain Eco 24Heating, Home Heating SystemsBoiler Combi Heating

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Main Eco 24 Boiler: Cold Then Hot Then Cold Water