Boiler makes banging noise

[Clive_hall88]

Hi,

I am wondering if anyone is able to help me.

I am currently living in a 2 floor house with a combi boiler.

After about 5-10 mins of either my heating or hot water being switched on my boiler makes a banking sounds for a few seconds (sounds like air is passing through the boiler). Before this point if the hot water is being run it is at a tempid temperature and after this becomes very hot.

I have tried bleeding the radiators in the house and removed a lot of air from one of the radiators but the problem still percists.

Please can someone give me advice as to what to do next.

Many thanks


Clive

 

[migoplumber]

sounds like boiler kettling and possible failure of high heat stat, or lack of pump circulation

 

[Bernie2]

I know its obvious but is there enough water in the system?

Its just that I notice, you said you had bled the rads, but not mentioned refilling system.