Gas boiler banging after refilling heating system

12 Apr 2004
Reaction score
United Kingdom
I have just emptied and refilled out gas central heating system but when I turned it on the boiler started banging and turned itself off.

What have I done wrong?

How should I have refilled it.

All I done was trurned the header tank water back on and bled all the air out of the radiators.

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air in the system, try making sure there is some water in the header tank first.

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