trapped air in boiler heat exchanger

[longshanks]

Hello.
I have just had my boiler serviced and the service guy answered a question I asked by telling me that I had trapped air bubbles in the heat exchanger and that there is a chemical treatment you can buy to put in the system but he could not remember it's name is he correct and what is it called.
regards

 

[aggis]

Fernox F2 noise reducer or sentinel X200 noise reducer, both very good for what you want.
If system symtoms persists you'll need a full flush, maybe powerflush.

 

[ferret]

its probably more likely to be 'kettleing' you can hear caused by sludge and scale , the chemicals aggis has suggested will sort this out for you , if it was air it could be cleared by surging the pump or 'boiling it up'

 

[longshanks]

Many thanks for both your reply's
Ferret, what is "surging the pump or boiling it up"
regards

 

[aggis]

You're prob best just adding chemicals, leave the boiling up to proffesionals

 

[longshanks]

Thanks anyway, I just wanted to know what it was.

 

[aggis]

It all involves getting the system over hot & surging the pump at certain times [ on & off],