If your boiler is making. › Home › Heating and cooling. Rattling noises · Loud humming noises · Vibrating noises · Boiling kettle noises · Banging noises · Dripping or gurgling noises · Tapping noises · Drone noise. Gurgling sounds in your boiler can be caused by low water pressure. The pressure gauge is usually found within the control panel. In some cases, it may be. A leak in your boiler system; Limescale/depository build-up; Boiler overheating/faulty thermostat. #1 A leaking system (in your boiler or. A buzzing or whining sound coming from inside your boiler is a genuine cause for concern that is typically caused by worn pump bearings, vibrating fan bearings. Boiler making banging noise? If your boiler is making loud banging noises, there could be a problem with your thermostat or, equally, a build-. More often than not, a banging noise from your boiler is traced back to a process called “kettling”. This is usually when limescale builds up on the heat. The boiler is whistling Whistling noises, as well as banging, can also be caused by kettling, a loss of water or even trapped air. It may be that a squeaking. Boiler noise, or 'kettling', has a number of potential causes, and these can be divided into chemical and mechanical factors.