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Mend Primatic Cylinder Boiler Central Heating Heat Exchanger

Primatic Cylinder, no hot water C, heating OK how can I fix?

Primatic Cylinder: Central Heating works OK, but no hot water top pipe enntering ciylinder ( heat exchanger coil ) is cool. I have tried turning all Hot taps on together but no joy. I do not fancy boiling the system. Any Ideas gratefully received.

George Heron.
October 2008
PrimaticPrimatic CylinderHeating, Home Heating SystemsBoiler Central Heating Heat Exchanger
Thanks I will try it when the weather warms up. This is a soft water area, no trouble with Lime scale.

George Heron.
November 2008
Leave system off to cool down (for air bubble to reform)
restart boiler from cold
If it fails to heat water , scaled up , replace cylinder with a true indirect type

a
October 2008

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Primatic Cylinder: No Hot Water - Fix?