Hi
The radiator in my son's bedroom starts making loud knocking noises approx. 1 hour after the central heating has been turned on. We have to turn the upstairs thermostat down to cut off the supply for it to stop.
The radiator sounds as though it is only partially full of water as you get a kettling effect when the heating is turned on like a kettle boiling. I have tried to air the radiator but even when all of the air is released, no water comes out. We also have a radiator in the back bedroom which does not make knocking noises but is not as warm as the rest of the radiators in the house. Again, I have aired the radiator but no water comes out when all of the air is released.
Can you let me your thoughts.
The radiator in my son's bedroom starts making loud knocking noises approx. 1 hour after the central heating has been turned on. We have to turn the upstairs thermostat down to cut off the supply for it to stop.
The radiator sounds as though it is only partially full of water as you get a kettling effect when the heating is turned on like a kettle boiling. I have tried to air the radiator but even when all of the air is released, no water comes out. We also have a radiator in the back bedroom which does not make knocking noises but is not as warm as the rest of the radiators in the house. Again, I have aired the radiator but no water comes out when all of the air is released.
Can you let me your thoughts.