Knocking Noise Coming From Radiators – How to fix the problem?

Knocking Noise Coming From Radiators ?

We can help you. Here are some of the causes.

This is one of the most common problems faced by homeowners. Air trapped inside the radiator, or the limescale building up on the radiator metal from inside, are the two most common reasons behind this problem. Here is how you can fix a knocking noise coming from radiators.

Letting Air Out Of the Radiator

You can let the air out of the radiator by allowing it to bleed. First of all, you will have to locate the highest bleeder valve on your radiator. It looks like a hex nut with a head that has a little spout. In some cases, the nut is equipped with a special head that requires a special tool to unscrew, which can be bought in your local DIY store.

Before opening the bleed valve, turn the radiator ‘on’ for about an hour. This will ensure the system is heated up thoroughly and builds up enough pressure. Now turn the boiler ‘off’. Place a bucket directly under the bleed valve on the floor and slowly unscrew it. You will have to be very careful while doing this, as the radiator and water in it are still hot. As soon as you unscrew the valve, air, along with water starts coming out with a sputtering like sound.

After sometime, when you no longer hear a knocking noise coming from radiators and the water starts flowing smoothly, close the valve. Turn on the radiator and check for the knocking and banging sounds. If they still persist, repeat the process again.

Power Flushing

If you are still unable to resolve the problem, you may consider power flushing. This is also an easy procedure. But, due to the nature of the chemicals involved, it is recommended to hire a professional to do it for you.

First step involves loosening of all the debris and the limescales built up inside the radiator, with the help of fast flowing fresh water mixed with chemicals. Once all the sludge is loosened, it is flushed out of the radiator with some more fresh water. Power flushing ensures effective boiler performance and reduced power consumption.

Other possible reasons for the knocking noise coming from radiators

  •  incorrect flow rate
  • inadequately filled feed tank
  • faulty pump

If you are not sure of the exact reason, it is always a better idea to seek the help of a skilled professional.

We are gas safe registered and can fix any problem in East London having to do with any type of gas appliances. Contact us today for any Knocking Noise Coming From Radiators.