We have a banging noise in the pipes in the loft, the boiler rises to 99 degrees and then starts hissing. Our heating firm have fitted a thermostat to the pipes in the loft as they said they had experienced this on a few of these boilers but this has not worked and we still have the same noise.

Kelly, November 2008

if the boiler is reaching 99 degrees sounds like you need a new boiler thermostat

tim, January 2009