Crackling Rads / Combi 105E


24 Oct 2003
Reaction score
United Kingdom

First time on site. Looks good so far.

Not sure if this has been answered before on site but we have probs with our new Combi Baxi Instant 105E.

Since we had it installed 6 months ago, we are getting a crackling noise in the rads every time the water is run or the boilers heats up. Sometimes the crackling noise is so loud is wakes up our 1 year old. We got the local plumber back to have a listen but he said it was caused by the heat moving along the pipes ?? Strange answer when the rads crackle when the CH isn't on and they are full of cold water.

I think it is the pressure in the system as when the pressure is lower following bleeding - the noise quietens down. The higher the pressure the higher the noise.

Any ideas on how we can quieten the noise down ??

Thanks in advance.
MC. :(

Thanks for your help.

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