When to Replace Boiler & How Often Should an Old Boiler Be Serviced?

Got a deteriorating boiler, and considering a replacement? Not sure how long boilers last?

No problem. This quick guide is going to help you understand whether you should ditch it or fix it!

How Long Do Boilers Last?

So, how long should boilers last?

Some boiler manufacturers offer as little as 2-years warranty, which I personally believe, isn’t a great indication of product quality.

On the flip side, a friend’s about to upgrade his boiler (it still works), and it’s 22 years old!

Like a car, a lot of how long your boiler is going to last, comes down to its quality, and how it’s looked after (more on that later).

The more important question is…

How Often Should A Boiler Be Replaced?

When the potential savings due to reduced energy consumption, outweigh the monthly cost of a new boiler that’s more energy efficient. To check that you can use this clickable form, get a price on screen, as well as the monthly finance cost for a new Worcester boiler.

Or, when a boiler is out of warranty, and you’re faced with constant repair costs that span into the 100s of pounds.

  1. Repair Costs

Let’s start with the repair costs associated with an old boiler. Because unlike energy consumption, this isn’t a savings guestimate based on studies. It’s fact; it’s the money that your boiler is costing you every year.

If you have a major failure on your boiler within the warranty period, your manufacturer should honour that warranty, and replace the offending parts.

One boiler we like, is the Baxi 600 Combi. For 7-years, Baxi have got you covered. If you’re out of warranty, repairing your boiler (check out our guide to boiler repair costs here) is going to start costing you a tonne of cash.

A typical example would be a pump, around £250 to replace. But, pumps are robust. If that’s given up the ghost, there’s a good chance other parts are about to follow suit.

Repair Costs & A Boiler Health Check

It’s unlikely you’ll find a boiler repair company offering a specific service that gives you an overview of the current state of your appliance. But, there’s no harm in asking your engineer next time you have a service.

You’ll want to get them to assess expensive components for wear and damage, to get an overview of the condition your boiler is in. That means parts such as the:

  • Printed circuit board (PCB)
  • Fan
  • Air pressure switch
  • Pump
  • Heat exchanger
  • Gas Valve
  • Burner

If your boiler…

  • Has multiple expensive components that need replacing
  • Is out of warranty
  • Has a low energy efficiency rating

I’d be leaning towards a replacement. Or, at the very least, be getting quotes for both replacement and repair, and making a decision with the facts in front of you.

Either way, you can get quotes for both repairs and replacement boilers from multiple heating engineers here.

If your looking for a replacement and specifically want a Worcester boiler, we’d suggest using HEATABLE. Using their clickable form, you can get a price on screen in 90 seconds, with finance options available.

  1. Energy Consumption

The next thing a lot of homeowners don’t consider, is energy consumption.

Some old boilers might surprise you, in terms of how much energy they use.

The Energy Saving Trust estimates that savings of up to £305 per year can be gained from a new boiler. Given you can get boilers on finance for as little as £12.94 per month, you could:

  • Have a new boiler
  • Cover the cost of repayments
  • Have £101 to spare after repayments, thanks to energy savings

Of course, this £305 saving is going to reduce dramatically if you’re not using a G-Rated boiler, or you live in a small property with lower energy bills.

Anyway, here’s the chart:

Old boiler ratingSemi-detachedDetachedDetached bungalowMid terrace houseMid floor flat
G ( < 70%)£200£305£155£175£95
F (70–74%)£140£210£105£120£65
E (74–78%)£120£180£90£105£55
D (78–82%)£120£180£90£105£55

How Much Should A New Boiler Cost?

Expect to pay upwards of £1,600. We’ve created a detailed guide to new boiler costs here.

If you’d prefer, you can jump online now and compare quotes from 3 different installers. Then compare that directly to an on screen price from HEATABLE. They’re are a new kid on the block for online boiler installs, so prices on Worcester boiler installation are about as good as you’ll get.

Protecting Your New Boiler

As we’ve already mentioned, the life of your boiler is dependent on the care you give it. If these preventative measures haven’t been put in place in your current heating system, there’s a good chance your boiler is suffering.

Annual Service (To Comply With The Manufacturer’s Warranty)

Prevention is better than cure, and an annual service from a Gas Safe engineer is going to help spot potential problems, before they develop into real problems.

And, if you want to comply with the warranty terms and conditions from most boiler brands, you’ll need to get one anyway.

There’s a quick guide to boiler servicing costs here.

Central Heating Inhibitor

Over time, the water in your heating system gets dirty. It’s a mixture of minerals in water, as well as rust breaking from the inside of towel rails, your radiators, and even from the inside of copper pipe work.

Dosing your heating system will break down these particles, ready for them to be removed from the system.

We’ve created a guide to central heating inhibitor here.

Magnetic System Filters

Now the particles are broken down into manageable chunks, they can be caught by a magnetic system filter. We’ve created a guide to exactly what they do, and which are the best brands here.

Most boiler installers will fit a magnetic boiler filter as standard.

And, if you know you’re in a hard water area, consider a limescale reducing filter. This focuses on removing limescale from the heating system.

What’s Next?

Thanks for reading our quick-fire guide to how often you should be replacing your boiler.

Got questions about boiler replacement?

Drop us a line, and we’ll get back to you as soon as possible.



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