Solid fuel Rayburn problems - Rayburn making loud noises Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[Rhiagriff]

Hi there,
I'm having issues with my Rayburn it's solid fuel and heats the house and water. We keep having problems with boil over I can hear it upstairs it's very loud and worrying! We've turned all the radiators down as its summer and very warm. We don't seem to be able to regulate it.
We have a horstmann c21 in place also.

Very Sorry for the novice terminology!