Hacks October 06 2025 2 min read

How often does boiler need servicing? Signs to watch out for

Does your boiler need servicing? Check this list to know more about warning signs.

To make sure your boiler is working correctly and to understand if it needs to be checked by a professional, watch out for these signs:

How often does boiler need servicing? According to the Sustainable Energy Authority of Ireland, your boiler should be serviced once a year by a Register Gas Installer (RGI), a qualified professional, to keep it safe, efficient, and reliable.

Regular servicing not only helps reduce energy bills but also ensures your heating system performs at its best, especially before the colder months. With winter approaching, it’s a good idea to check for these warning signs and decide if your boiler needs attention sooner than your annual service date.

The pilot light is turned off

A pilot light is a gas flame used by your boiler as an ignition system. If this pilot light is not turned on or keeps turning off regularly and frequently, your boiler will be unable to work correctly. A boiler service operated by a professional will quickly solve this kind of issue.

Loud or unusual noises

It is completely normal for a boiler to make sounds when it is turned on and working, but particularly loud or unusual noises might be a sign that you need to book in a boiler service.

Some of these sounds could be kettling, whirring, banging or whistling and the could all lead to different issues. A professional will be able to identify the source of the problem and provide a solution.

Strong or unusual odours

Strong or unusual smells coming from your boiler might indicate the need for an intervention. Typical signs might include an eggy-like odour, or a gas or oil smell. In this case, make sure to check for dark marks on the casing of your boiler: that might be an additional sign and confirmation that your boiler needs servicing.

Poor performance

Inefficient heating or radiators that fail to warm properly are among the most common signs it’s time to service your boiler. Checking how your system heats your home is an easy way to know how often boiler needs servicing and whether you should call in a professional.

Did you know that a Gas Boiler Service with Energia will only cost you €120? To read more about this and make a booking, check out our Gas Boiler Services page here.

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FAQs: How often does a boiler need servicing?

Does a boiler need servicing every year?

Yes, the SEAI recommends annual boiler service carried out by an RGI to ensure your boiler is functioning properly.

What does boiler servicing involve?

A boiler servicing includes inspection of appliance location, ventilation, clearances and checking the gas soundness of the appliance.

How much should it cost for a boiler service?

Energia offers a comprehensive 28-point gas boiler service for €120, one of the most competitive prices on the Irish market.

Is servicing your boiler worth it?

Yes, annual servicing reduces breakdowns, enhances efficiency, and extends your boiler's lifespan.