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Mend Ravenheat RSF 820/20 Combi Boiler Heating System Problem

Ravenheat RSF 820/20.Hot water luke warm?

When taps are turned on the combi boiler fires up and for less than a minute the water is hot.
After that the water goes luke warm,checked boiler at this time,boiler still fired up.
Any one help me with this problem.
cheers
albar

albar
February 2007

Ravenheat Ravenheat RSF 820/20 Heating, Home Heating Systems Combi Boiler Heating System Boiler Problem

Cheers Ben,i'll give it a go.
albar

albar
February 2007

deffinately boiler has sludge in plale to plate heat exchanger. needs to be replaced or taken out and cleaned

ben
February 2007

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Ravenheat RSF 820/20 - Lukewarm Hot Water