When to replace your boiler? Signs its time for a new boiler.

Your home's boiler functions as its engine. Its main responsibility is to keep all of your household appliances functional and efficient. Knowing the symptoms will help you recognize when it's time to replace a boiler because things can break down at any time, whether they are new or old.

Your boiler, which supplies hot water to your radiators and underfloor heating, is a crucial piece of equipment. Additionally, it serves as the primary source of endless hot water for the faucets in your kitchen, bathroom, and utility room, meeting all of your daily demands.

Your boiler, which is typically regarded as the center of the house, can account for up to 60% of your energy costs, so it's critical that you take good care of these large appliances.

You will benefit from greater heating and hot water quality, a smaller carbon footprint with associated energy bill savings, higher levels of energy efficiency, and, ultimately, peace of mind knowing that your boiler will work when you need it. We'll concentrate on when to replace your boiler in this blog post to save money on repairs.

Why put off replacing your boiler until you have major problems?


You might regret waiting to replace your boiler. If your boiler has to be replaced, do it now rather than spending money on unnecessary expenses and repairs.

If you're still unsure whether to replace your boiler, have a look at our list of the top indicators below:


When to replace a boiler – signs it's time to buy a new one:


New Gas Boiler


The only engineers legally permitted to install, maintain, or relocate a central heating boiler are those who are registered on the Gas Safe Register. Check the tradesperson's Gas Safe Register ID card to make sure they are qualified for the task because carbon monoxide poisoning can be lethal.






Gas Boiler Replacement


How Long Does a Boiler Last?


The lifespan of a boiler varies depending on the model, but generally speaking, it should last you between 10 and 15 years. However, if you give your boiler routine maintenance, it might even last longer. It all depends on the precautions you take to avoid any issues.


1.       Is your boiler more than 15 years old?

There are boilers that endure 10 years, 15 years, and even 20 years! However, if your boiler has been in use for more than 15 years, it is either close to or has passed the end of its useful life. It's time to replace your boiler in any case.

Even if there are no obvious problems with your boiler, this is still true. Boiler technology has advanced tremendously recently, and older models just aren't as energy efficient, which will end up costing you more money over time.


2.       It's wasting money

In those 15 years, technology will have evolved significantly, particularly in the field of boilers, says Andy. What was once a white, bulky box attached to the wall can now resemble a product from an Apple shop. They have advanced mechanically in addition to visually. Modern boilers save you money because they are more efficient, quieter, and smaller than ever.


3.       Is your energy efficiency rating the reason to replace your boiler?

Why should we expect anything less from our boiler when we demand everything in our lives to be of the highest calibre? You are probably overpaying for energy if your boiler is not graded A or B.

A simple approach to determine your boiler's efficiency is to look at the rating on its energy label. These labels have a seven-point colour scale, with the most efficient boilers being green, and the least efficient ones starting in dark green (A-rated) and ending in red (G-rated).

It's time to replace your boiler if it's only operating at F or G. Your boiler's efficiency is just about 70% on this grade. You could save anywhere from €300 to €500 each year by moving up to an A grade.


Gas Boiler Repair

4.       It’s broken or faulty

A boiler might develop a malfunction even if it is still within the recommended age and warranty. To identify any issues, it's crucial to get an annual Dublin gas boiler service, particularly during the warmer months.


The warning signals of a defective boiler

Numerous factors might cause a boiler to malfunction. There are warning indicators for any issue that you should be aware of. It may be more cost-effective to replace a boiler rather than boiler repair an existing one if your boiler consistently experiences any of the conditions listed below.



DID YOU KNOW: Stillorgan Gas, Plumbing and Electrical are the largest official Ideal gas boiler installers in Dublin.



5.       Leaks or drips

A leak in your boiler can start in a variety of locations. Knowing where your boiler leaks from can help you to really isolate the issue. A broken part inside the boiler is the most frequent reason for a leaky boiler. There may be damage to the pressure valve or pump seal.

Your boiler pressure can be too high if the pressure valve is the problem (see below). If the problem is with the pump, it can simply be that it has worn out over time through repeated or heavy use. The pipes in your system are another frequent location for leaks. It's advisable to contact an engineer who can accurately diagnose the issue as corrosion could be the cause of this.


6.       Lower pressure

Numerous things, such as water leaks, bleeding radiators, and the need for a new pressure valve, can contribute to low boiler pressure. 

Your boiler's pressure is simple to check. You only need to check the internal pressure gauge. You might need to address a problem if the needle is below 1.

Contact a plumber for the radiator to determine the cause of any sudden pressure drops, even after repressurizing your system.



DID YOU KNOW: Stillorgan Gas, Plumbing and Electrical can install a New Gas Boiler in Dublin tomorrow itself 



7.       Higher pressure

A pressure gauge is deemed to be too high if it reads more than 2.5. The major causes are typically too much water in the system or broken boiler parts. The additional pressure will strain the system, which could result in leaks and cracks.


8.       Excessive Noises

Unusual noises emanating from your radiators or system are typically a sign that something is wrong. In some cases, the sound itself helps identify the issue:


·         Gurgling: Do you notice any bubbling sounds? Radiator bleeding can solve the problem, which is typically brought on by trapped air in the radiators. Or perhaps the primary system has air that is trapped.


·         Kettling: This phrase is used when a whistling sound resembling a kettle boiling on a burner is heard. This might be the outcome of limescale accumulation on important internal components, which then heat up.


·         Humming: It may be a clue that the heating elements are malfunctioning if the system is humming or vibrating. This implies that there is a problem. All boilers make some amount of noise during regular operation; however, if the noise is new, there may be trouble. Common causes include loose parts, high water pressure, or a pump that is operating too quickly.


·         Dripping: There probably is a leak somewhere, which could cause a drop in pressure or harm to electrical components.


·         Tapping or clicking: This typically denotes the possibility of an ignition failure.


9.       Fluctuations in water temperature

It may be time to get your boiler re-pressurized if you use water fixtures like taps, showers, or baths throughout your home and notice temperature variations. In case none of that works, think about replacing your appliance.


10.   Are your radiators taking longer than normal to heat up?

It may be time to replace your boiler if your radiators are heating up significantly more slowly than usual.

Give us a call to get it checked out if your heating takes a long time to fully warm up, the house is never warm enough, or the water is on but there is never enough hot water.


11.   Constant 'lockouts'

When the boiler is not operating, a lockout procedure known as a boiler is initiated. If this is happening frequently and there are more engineer callouts, it might be time to think about if buying a new boiler would be more cost-effective in the long term. It could be more challenging to find replacement parts or components as a boiler ages. Therefore, it will actually be beyond economical repair (BER).


12.   Does it often require repairs?

If you're spending a lot of money on boiler repairs numerous times a year, you're probably wasting your money. Boilers shouldn't need to be repaired frequently and should last up to 15 years. You should be able to tell whether it's time to contact a boiler engineer to replace your boiler when you consider the energy inefficiency and increasing power bills.


13.   Check the flame’s colour

If your flame is yellow, your home is emitting carbon monoxide. This is risky and may result in symptoms such as headaches, nausea, and dizziness. The flame should always be blue in the ideal situation; otherwise, you're in trouble.


How Long Does it Take to Fit a New Boiler?


Gas Boiler Service Dublin


This question doesn't have a simple solution because it depends on a number of different things. These include the type of fuel being used, the type of boiler being installed, whether you are moving your boiler or whether you already have one.

Additionally, consider whether you're switching boiler types and which particular types you're switching to and from. Not to mention the difficulties your home has with regard to your water supply.


Given all of this, there are some suggestions regarding when to install a new boiler. An installation of a new boiler can typically be finished in six hours to four days. Here is a quick summary of the various time periods:

·         Straight boiler replacement takes 4-6 hours, whereas installing a brand-new combi boiler takes 1-2 days.

·         It will take 1-2 days to move your boiler.

·         2-3 days for changing the boiler type

·         2-3 days for a change in fuel type

·         Changing the Boiler type and position changes take 3–4 days.




Your peace of mind regarding the comfort of your home is influenced by the boiler's longevity. However, certain issues could occur and necessitate replacing your boiler.

We've discussed some of the most significant warning signals that it's time to replace your boiler in this blog post, along with the typical timelines for fitting and installing a new boiler. If you're prepared to replace your unit, don't wait to schedule a skilled boiler installation service.

Want a FREE Quote to replace your boiler or still need help to decide if you should replace your boiler?

Contact us here Stillorgan Gas, Plumbing & Electrical Services to speak to one of our boiler experts today by giving us a call on 086 222 7794 or email us at info@stillorgangas.ie.



Leave a comment

The following cookies load by default:

Strictly necessary cookies
These cookies are essential for visitors to be able to browse the website and use its features. None of this information can be used to identify visitors as all data is anonymized.

Site session
Purpose: To remember different visitor preferences on the website.
Duration: For duration of browser session.

Preferred language
Purpose: To be able to provide the website in the visitor's preferred language (if the website contains multiple languages).
Duration: 1 year.

Purpose: To be able to show prices in the currency matching the visitor's preferences.
Duration: 30 days.

Google Recaptcha
Purpose: To be able to validate whether the visitor is human and to limit the amount of spam from contact forms.
Duration: 1 year.
Provider: Google.

Third-party cookies
These cookies collect information about how visitors use the website, like which pages they've visited and which links they've clicked on. None of this information can be used to identify visitors as all data is anonymized.

Purpose: Registers a unique ID that is used to generate statistical data on how the visitor uses the website.
Duration: 1 year.
Provider: Google.

Purpose: Registers a unique ID that is used to generate statistical data on how the visitor uses the website.
Duration: 24 hours.
Provider: Google.

Purpose: Used by Google Analytics to throttle request rate.
Duration: 1 year.
Provider: Google.

We also integrate with social platforms on this site that allow you to connect with your social network in various ways. Social media integration will set cookies through the website which may be used to enhance your profile on social media sites or contribute to the data they hold for various purposes outlined in their respective privacy policies.