Boiler Making Noise When Switched Off

For most homeowners, any noise from your boiler is a cause for alarm. No matter how little the noise is, whenever you hear it, you can’t help but keep wondering what could be causing and if it is dangerous.

One of the more concerning is noises is a buzzing or gurgling sound that comes from the boiler even when you have switched it off. It is more concerning because the boiler is off so you don’t expect any noises.

There are a variety of reasons that could be causing the noise. Our experts have diagnosed a number of cases and even though the findings are not alarming, you need to have the boiler checked either way.

Air in the system

The most common reason for the noises you might hear in your boiler after you have switched it off is air that is trapped inside the boiler. if the cause of the noise is the air, it will always sound like rushing water.

If air is trapped inside the system, once the boiler has been switched off, the air is going to be pushed around by the circulator. If the air has worked its way into the boiler, you will also hear some clunking noises.

See Also: Ways to Ensure Your Boiler Lasts Longer

Even though the situation sounds dire, the fix is quite simple. You could have the problem rectified by simply bleeding the system. If this does not help, then it might be a good idea to call in our experts at 2 RED to have a closer look at the system.

Faulty thermostat

The other reason your noise could be coming from your boiler when it is off as a result of a failing thermostat. Ideally, when you switch off the boiler, the circulating pump should continue running until the water cools to a certain temperature.

There is a thermostat that should notify the pump when to stop working. If the thermostat is not working properly, it will not relay the right information to the pump. As a result, you can hear noises coming from the boiler even when it is switched off. Our experts can help you identify the faulty thermostat and get it working properly again.

Faulty valve

A dodgy valve could also be to blame for the noisy boiler. Even though is slightly rare, a failing valve can also cause the circulating pump to keep working even when the boiler has been switched off. The movements of the pump could be what is keeping you up at night.

When it comes to boilers, you can’t help but think the worst of any unusual noises. You always want to know how serious it is and how soon you can have it looked at. Having the boiler and the central heating serviced regularly can prevent some of these noises. It can also help to identify failing parts and replace them in good time.

Even for the case of noises made by your boiler when it is switched off, our maintenance and service team can help avoid such incidence. For comprehensive service and maintenance of your boiler, give us a call today.

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