I have a Halstead boiler that has been installed for approximately 10
months. I've not had any problems at all until tonight when the boiler
started making strange noises.
After the boiler has been on for a few minutes there is a rattling
sound heard on the landing. If you put you ear near to a radiator then
the sound can be heard here also albeit slightly muted. I found the
source of the sound to be at the boiler itself. There is a whistling
sound and the noise a kettle makes coming to the boil, pops, cracks
etc. I have a feeling that the boiler is literally boiling the water.
This is strange for a number of reasons:-
1) Boiler only 10 months old
2) The system has been cleaned using Protex
3) The system has inhibitor in it, Protex again
4) Setting the thermostat lower on the boiler doesn't appear to make a
difference, i.e. it eventually comes to the boil.
Does this sound like a faulty thermostat somewhere in the boiler? By
the way the boiler is extremely hot to touch!