Is your boiler making an airoplane sound noise? That is also called kettling, we will explain the main causes and how it may be fixed.

A noisy boiler can be down to a number of things. Sometimes it is perfectly normal for a boiler to make a noise, such as when the pilot light is ignited or when the pump circulates water around the boiler’s burner and heat exchanger. However, there are other times when a noisy boiler is a cause for concern.

Banging or whistling noises, for example, are a sign of boiler kettling; the term used to describe water reaching boiling point inside the boiler, which creates steam and causes pressure to potentially rise to higher levels. Gurgling noises, on the other hand, are caused by trapped air passing through the system and moving water in the boiler and sometimes the radiators.

If you hear unusual sounds coming from your boiler system, you should first identify the potential causes.

What Causes a Boiler kettling Noise?

Boiler kettling is a common cause of a noisy boiler. Water within the system is typically heated to around 70 °C inside the boiler circuit before being pumped throughout a home. However, the flow of water can be slowed down, causing the water to heat too quickly and reach boiling point (100 °C). When this happens, steam is generated and air becomes trapped inside the system, giving off a whistling sound; hence ‘kettling’. Boiler kettling can also create banging noises.

There are several reasons why water might be pumped around at a slower rate:

• Limescale build-up

• Faulty thermostat

• Damaged pump

  How to stop boiler kettling

  If you suspect your boiler is kettling, you should call a Gas Safe installer to inspect your system. Boiler kettling can be dangerous and should only be inspected by a qualified professional. If the source of the issue is limescale build up, they will most likely need to perform a chemical clean or power flush. If the issue stems from faulty parts, these parts will need to be replaced.

  How Much Does It Cost to Fix a Boiler Making Noise Like an Aeroplane or Boiler Kettling?

  First and foremost, to fix this issue, you will likely need to have your boiler pump replaced. This would likely cost somewhere in the region of £190 to £300. This includes both the cost of labour and supply costs.

  Please note that the price of labour can differ based on factors such as where you live. contact local gas safe engineer in London todaty