How Much Does a Boiler Service Cost in 2021? [Detailed Guide]

Our 5-minute guide to boiler service cost covers everything from prices to tips for avoiding repairs through good boiler maintenance. So, if you’re looking to get your boiler serviced but aren’t sure how much this could set you back, you’re definitely in the right place.

What’s more, if you’ve suffered a boiler breakdown and are considering a replacement, we’ll also give you a chance to compare (fixed) prices for top boiler models on your screen.

Heatable boiler clickable form

How Much Is a Boiler Service?

Boiler service typically costs between £70 and £90. For this price, you get a full inspection, flue gas tests, and a magnetic system filter clean-up (if you’ve got one). However, note that these numbers exclude the cost of parts and labour needed to perform repairs.

Why Boiler Service Costs May Vary

Firstly, the price of boiler service will vary depending on your location. For instance, if you’re in London, you’ll be stuck paying in the higher end of the price bracket.

You’ll likewise pay more by opting for a well-known national boiler servicing company. National firms charge in the region of £110-135, and that’s just for boiler service.

Average boiler service cost

If you have other gas appliances, you can have them bundled in to reduce the overall price. The service of a boiler, gas fire, and hob is likely to be in the £100-£125 range.

Does One-0ff Boiler Service Cost More?

One-off boiler service shouldn’t cost you any more than annual checkups — you should still pay in the neighbourhood of £70-90.

That said, it’s always best to get your boiler looked at at least once a year. That’s because regular service can catch issues before they deteriorate and lead to a full-out boiler replacement. Still, a one off boiler service is better than no service at all, just like spending £70-90 on service is far better than dropping £2,000 on a brand new boiler.

How Often Should I Have My Boiler Serviced?

We recommend getting an annual boiler service. In fact, most boiler manufacturers won’t honour their warranty unless your boiler has been serviced by a Gas Safe Engineer every 12 months.

So, if you’ve got a reasonably new boiler, opt for regular service and be sure to obtain a receipt for it. Most Gas Safe heating engineers will be able to provide a receipt with a description of works (including flue gas tests), which you can present to the boiler manufacturer if you need to use the warranty.

Where Can I Find a Gas Engineer to Complete My Boiler Service?

You can find local Gas Safe Engineers on the Gas Safe Register. All professional tradesmen who work on gas appliances (such as your boiler), must have Gas Safe registration. So, if you’ve got a quote from a local heating engineer, take their Gas Safe number and ensure it checks out by referring to the register above.

What kind of fuel does your boiler use?

Grab your fixed price online by 3PM, and get next-day boiler installation.

Worcester boilers installed from as little as £1,795.

What Should Be Included In the Boiler Service Cost?

The boiler service cost should include an inspection of your appliance, a flue gas test, and a clean-up of your magnetic filter. 

Always ask your boiler engineer for a description of works, including the results of any tests they’ve run.

Landlords require (by law) a Gas Safety Certificate on completion of the service. Once the procedure is completed, landlords will get the following information on their boiler service certificate:

  • Details of flue and flue gas tests
  • Gas Safe number, engineer’s name, company name, and address
  • Issues uncovered from the inspection and advice on what to do next
  • Details of any issues that are cause for immediate safety concerns
  • Details of additional gas appliances checked (i.e. fire or hob)

This certificate isn’t necessary for homeowners, although you can request one too.

Extras to Be Included In Your Boiler Service Cost

It’s wise to ask for the following extras when you request the service: 

  • A quick inspection of all internal boiler parts
  • Check boiler pressure loss, and inspect heating system for leaks if there is

Make sure you ask for these additional tests when you book a boiler service, as they may affect the cost of the boiler service.

Parts Inspection

Boiler repair is often needed because inspecting engineers don’t check all of the boiler’s parts. But by requesting a more thorough inspection, you may prevent a large repair bill and prolong your boiler’s life. And in the world of heating, prevention is usually far cheaper than the cure — new boiler prices can be sky-high, possibly setting you back over £2,000 with installation. 

Inspecting the components below will make the largest impact on your boiler’s lifespan:

  • Heat exchanger
  • Pump
  • Fan
  • Gas valve

Boiler Pressure Check

You want the engineer to check for drops in pressure and leaks. (Leaks kill boilers quickly — if you have one, you want it found and fixed instantly).

Do Worcester, Baxi, Vaillant & Others Brands Boiler Service Cost Vary?

You shouldn’t pay more because you own a specific brand or model — most boilers require the same amount of time to get serviced. 

Many boiler manufacturers have a dedicated installation and a local service team. So, if you’d prefer a heating engineer that specialises in a particular boiler, then you can head directly for their service teams.

However, note that boiler service cost from the manufacturer’s own team may be more expensive. So, if you need Worcester boiler service, you may save money by not calling an engineer from Worcester themselves. Manufacturers also try and bundle their service with extended warranties and boiler cover that you might not actually need.

That said, you can find details of local service engineers below:

How to Protect Your Boiler Between Service Appointments

Regular service is one way of keeping your boiler in great shape. But if you have a qualified engineer servicing your boiler, it’s worth asking them for the following:

Hot Flush

Your heating engineer will douse the system with chemicals, then flush them through with the heating on. This procedure gets rid of sludge, which causes countless boiler breakdowns.

Magnetic System Filter

With the system flushed, you’ll want to add a central heating inhibitor. This device breaks down heating sludge, so the magnetic system filter can catch it.

Quality brands such as BoilerMag, Fernox and Magnaclean all supply inhibitors and system filters.

Scale Reducer

Finally, check to see if you’re in a “hard water” area. If you are, there’s a high chance of limescale build-up destroying expensive boiler components, like your heat exchanger. A high quality scale reducer (a limescale filter) will help keep limescale out of your system.

Boiler Service: What’s Next?

Thanks for reading our guide to boiler servicing costs.

Thinking about a replacement boiler and wondering about new boiler prices? Use this calculator to determine what size boiler you need, and get a fixed, on-screen price in less than 2 minutes.

If you think we’ve missed anything, or would like to share your own experience with boiler service, please leave our readers a comment below.

Avoid Expensive Breakdown Costs
Boiler Replacement Promise: If it's under 7 years old and we can’t repair it, we’ll replace it.
Try YourRepair. From £9/mo
All plans include: annual boiler service, all parts and labour, unlimited support and 24hr helpline.

Leave a comment

Your email address will not be published. Required fields are marked *


Fix things and tutorials

Get a Boiler on Finance

The best pay monthly packages available

Read guide
Heatable Boiler Replacement

Want a new boiler from HEATABLE?

Read guide
WarmZilla Boiler Replacement

Want a new boiler from WARMZILLA?

Read guide
Boiler Installation Costs

Confused about new boilers and their costs?

Read guide