As part of a bathroom refurbishment, our installers fitted a new radiator. Since then we have noticed significant whistling in our central heating system (not on start up of the system). I have bled the radiators (air was in one radiator only but no further air released in subsequent bleeding) but the whistling continues. Before the new radiator we had no noise in our central heating system. The system was was extensively refitted 6 years ago, including a new potterton suprema boiler.
Any advice appreciated on what could be wrong and what to do next.
Many thanks
Any advice appreciated on what could be wrong and what to do next.
Many thanks