Oil Boiler Service Costs & FAQ: The Homeowner’s Guide To Service

If there’s one thing we know for certain; oil boilers are expensive. Not just to replace, but to fix as well.

In our 5-minute guide we’ll cover expected oil boiler service costs and frequently asked questions  about this type of boiler.

Greenstar Heatslave II - oil boiler

Before going any further, an important note. It’s a legal requirement for an oil boiler service to be completed by an OFTEC registered engineer — whether it’s new or used.

We only connect our readers who need oil boiler services with OFTEC registered engineers. You can get servicing quotes for your oil boiler here.

Oil Boiler Service Costs

So, the big question; how much does an oil boiler service cost? 

Depending on your location (for instance, London is more expensive than Liverpool), expect to pay £70-90+VAT per oil boiler inspection session. Quotes will vary throughout the country.

Not sure how much OFTEC engineers in your area charge for their oil boiler services, and want a quick service quote?

No problem. Click here.

How Often Should You Service Your Oil Boiler?

Like Gas and LPG boilers, you should get your oil boiler serviced by an OFTEC qualified engineer every 12 months.

Why Is Servicing This Type of Boiler So Important?

Yup, it might seem like you’re flushing down the toilet every year taking care of your oil boiler. But believe me, the small annual outlay is well worth it.

And, here’s why…

Manufacturer Warranty For Oil Boiler Service

Most boiler manufacturers require homeowners to get their boiler serviced by a Gas Safe engineer every 12 months. If they don’t use this annual boiler service, the warranty could be void.

And, it’s a similar story with oil boilers. Check the small print in your terms and conditions about oil boiler services before purchasing.

There’s a good chance that the warranty only stands if you have an annual service from an OFTEC oil boiler engineer.

Oil Boiler Repairs And Unavoidable Costs

A lot of problems with oil boilers can be completely unavoidable. And, boiler servicing is the best way to find potential problems, especially with a used boiler, before they start costing you money.

An oil boiler service will be inclusive of a visual inspection of crucial and expensive parts. So, you can be advised by your engineer what needs to be replaced, before it causes damage to your tank, heating system, and other important parts.

Efficiency And Money Saving on Boiler Service

A poorly maintained central heating system is an inefficient one. And, inefficiency costs cold-hard-cash.

For example, sludge build-up is a common boiler-killer. And, up until the point it kills your oil boiler, it’s going to be less efficient. No extra warmth, but extra money on heating oil.

If an engineer cleans out crucial components during your boiler service, consider fitting a boiler filter. This helps remove the debris from the heating system, and prolongs the life of your oil boiler so you’re not burning through money on heating oil.

Check the System Regularly for Carbon Monoxide Poisoning

OFTEC engineers will be able to perform annual service checks on your oil boiler and system to ensure your family isn’t being exposed to poisonous fumes.

Carbon monoxide isn’t just a threat, it’s a killer. So, if not for anything else, get your oil boiler serviced to make sure your family is safe.

What You Should Expect From An OFTEC Oil Boiler Engineer

So, you know why it’s important to get an annual check-up, and you understand the average cost for an oil boiler service. 

But, what should be included in these services?

A normal annual service on your oil boiler will consist of three things:

  • Checking all parts are working correctly and not excessively worn
  • Testing the safety of the system
  • Analysing the efficiency of the oil boiler. Low efficiency can indicate there are hidden problems.

Oil Boiler Servicing Checklist (OFTEC CD/11)

Don’t take their word for it about oil boiler services. Make sure the engineer confirms they’ve done everything on the service checklist below.

And if possible, get every step of their services in writing. If there’s a problem, there’s a good chance the manufacturer will want service history proof to honour their warranty.

Proof of works and services will come in the form of a OFTEC CD/11. This details all works completed, as well as any advisories.

  1. Check all parts relating to safety, such as the pressure release valve and burner lockout
  2. Assess pipework to the boiler checking for any leaks
  3. Analyse the gases pumped out by the flue (they should use a gas analyser for this) to check they are within tolerance
  4. Make sure there’s no water in your oil tank

Any Questions About This Guide?

We’re always happy to offer oil boiler and heating advice.

Not sure if your oil boiler service quote is reasonable?

Check it against our list of contacts here.

Greenstar Heatslave II - External oil boiler

Got an oil boiler problem and don’t know what it will cost to fix this type of thing?

No problem. Leave a comment below and we’ll get back to you as soon as possible.

Don’t have an oil boiler? Check out our combi boiler service cost guide here.




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