Question about Water Heaters
C.H o.k but no hot water but boiler fires when tap opened
If the boiler fires when the tap is opened then the diverter valve is working ok it must be a blocked plate heat exchanger which is the stainless steel rectangular block inside the boiler connected to the pump and the mains cold water.
it will be blocked on the central heating part probably with black scale. it is possible to clean out but sometimes it is better to just change the plate. but remember to flush the system as well or the same thing will happen.
Posted on Mar 30, 2009
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Posted on Jan 02, 2017
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