Boiler kettling

4 Jan 2006
Reaction score
United Kingdom
My boiler Ideal mexico super 2 approx 16 years old has started to kettle over the last couple of weeks. I know the kettling is caused by scale build up in the heat exchanger and is introducing air into the system so I plan to drain down the system then refill using fernox F3 run it for a week as per instructions then empty.Then refill with just water, circulate, drain and then refill using Fernox F1 and boiler noise silencer. What I want to know is will this approach eliminate the kettling or would I be better off removing the heat exchanger while the systems drained down and cleaning it manually.
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what you propose should be fine.

pumping a different chemical through the heat exchanger alone would be better but would be an awful lot of work.

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