Why is My Boiler Making a Loud Vibrating Sound?

Boilers are an important appliance in every home, but if you notice yours has started making strange noises – in particular, a loud vibrating sound – this could indicate a serious problem. If ignored, it could even cause the whole system to break down – resulting in a loss of hot water and central heating.

In this article, the team here at Full Circuit Electrical will take a closer look at some of the reasons why your boiler may be making loud vibrating noises.

Why is my boiler making a loud vibrating noise, and is it dangerous?

There are a wide range of reasons why a boiler may be making a deep vibrating sound. It is important to get to the bottom of it because if neglected, it could become dangerous. 

Some of the most common reasons include:

Blocked flues

A boiler flue is a pipe that transports gases produced by your boiler and removes them from the home. If the flue has become blocked, it can cause your boiler to make strange noises. It’s important to unblock a flue as soon as possible. If not, harmful gases such as carbon monoxide may be emitted into your home rather than outside, creating a serious hazard. You shouldn’t attempt this yourself and must always call on professional support in these instances. 

Limescale and sludge blocking water flow

If you live in a hard water area, it is normal for limescale and sludge to build up in a boiler and block the flow of water. This can cause the boiler to vibrate. Regular boiler maintenance can prevent this from happening. 

Malfunctioning pump 

A broken pump in your boiler can also cause a loud vibrating sound. These vibrations will occur as the system struggles to move water through it. Components may need changing or a full pump replacement may be required. You should always seek professional advice on this issue. 

Loose components or fittings

If components within the boiler have become loose or dislodged, it can cause the system to vibrate. Inspect the system and tighten any loose connections you see, but contact a qualified boiler engineer if you’re unsure about what you’re doing.

Faulty thermostat 

If a thermostat isn’t working properly, it can cause the boiler to misfire, producing loud vibrations. 

Test the thermostat by comparing the temperature reading to the temperature of the room. If it is faulty, you should organise a professional replacement. 

Debris in the heat exchange

If debris has formed in the heat exchange, it can restrict water flow and cause vibrations. Using a cleaning solution to break up the debris will usually solve this issue, but you should consult a professional technician. In severe cases, this build-up of debris can even cause leaks, so it’s important to address the issue as soon as possible. 

Unbalanced central heating system

If your central heating system has become unbalanced, it can make the water flow uneven, which may result in loud, vibrating noises. 

If this is a problem, bleeding the radiators can help as it removes trapped air from the system. 

What to do when your boiler is making loud vibrating noise

If your boiler is making a loud vibrating sound, there are a few easy things you can do yourself, such as bleeding the radiators and checking for loose fittings. However, most boiler work must be carried out by a qualified engineer. 

Arrange a boiler service in York, Harrogate and Ripon today with Full Circuit Electrical. We can diagnose the problem and carry out the necessary boiler repair services swiftly and safely. 

Trusted and affordable boiler repairs with Full Circuit Electrical 

As your local boiler repairs experts in York, Harrogate and Ripon, Full Circuit Electrical is here to help with any issues your boiler may be encountering. With more than 20 years of experience, if your boiler is making strange sounds or you’ve noticed any other problems, don’t hesitate to get in touch. Give our team a call or book an engineer online now.