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boiler?

when i switch my radiators on my boiler flares up until the rads are hot then flarse down after that it flares on and off ever twenty seconds is this normal because it seems to be just a waste of energy

pete
December 2010
Heating, Home Heating SystemsRads Hot Seconds
no not normal, need a heating enr to look at it

erj
December 2010

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Boiler Flaring - Is This Normal?