Boiler Noise Investigation

What the service covers

A practical, fault-led investigation to identify the source of boiler noise and the impact on performance and safety.

• Listening checks to locate where the noise is coming from (boiler, pipework, pump, valves, radiators).
• Boiler diagnostics, fault code checks and performance readings.
• Component testing where appropriate (for example pump operation, fan, valves, heat exchanger behaviour).
• System checks that commonly cause noise, such as low pressure, trapped air, sludge, poor circulation or limescale related kettling.
• Safety checks and confirmation of safe operation where gas appliances are involved (Gas Safe registered work only).
• Clear explanation of findings and next steps, with repair options and priorities.

When a boiler noise investigation is most useful

Book this service if your boiler has started making new or louder noises, or if noise is paired with symptoms like poor heating, hot water temperature changes, pressure drops, or frequent resetting. It is also a sensible choice if you want to prevent a small fault becoming a breakdown, especially in rented properties or busy premises.

If you smell gas, feel unwell, suspect carbon monoxide, or your CO alarm sounds, treat it as an emergency and follow the manufacturer guidance and national gas emergency advice before arranging a visit.

How the investigation is carried out

The visit focuses on diagnosis first, not guesswork. The engineer will ask when the noise started and what changes you have noticed, then run checks to reproduce the issue where safe to do so.

You will be talked through what has been tested, what has been ruled out, and what the likely cause is. If parts are required, you will get clear options on repair, replacement, and any related work needed to prevent repeat issues.

What happens after the diagnosis

Where a safe, straightforward fix is possible on the day, this can often be completed during the same visit (subject to access and parts availability). If further work is needed, you will receive a clear plan of action and advice on how to run the system safely in the meantime.

You will also be told about any preventative steps that may help, such as correcting pressure issues, bleeding radiators, addressing circulation problems, or scheduling servicing to reduce future noise and wear.