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OFTEC Registered • Trusted Across Hertfordshire

Has Your Oil Boiler Been Serviced This Year?

A neglected oil boiler quietly costs you money: lost efficiency, higher fuel bills, voided warranties and — at worst — carbon monoxide risk or a tank failure that fails BS 5410. An annual OFTEC service catches the problem before the breakdown does.

Book Your Oil Boiler Service Call 01442 601 383
OFTEC TI/133 & BS 5410
Fully Insured Engineers
CD/10 Within 24 Hours
External Worcester oil-fired boiler — the kind of installation we service every week
5/5 From Google Reviews
★★★★★
5/5 from Google Reviews
OFTEC
Registered Engineers
UC Part of Utilities Combined Group
24hr Certificate turnaround
Why It Matters

The Hidden Cost of an Unserviced Oil Boiler

Most oil heating problems do not arrive with a bang. They build quietly — soot in the heat exchanger, a tired pump, a corroded tank — until a cold morning turns into a no-heat emergency, a failed sale or a denied insurance claim.

Carbon Monoxide Risk

A poorly burning boiler can spill carbon monoxide back into your home. An OFTEC service measures combustion CO and CO2 directly and confirms the flue is sealed and drawing properly.

Voided Manufacturer Warranty

Grant, Worcester Bosch, Firebird, Warmflow and Trianco all require an annual service by an OFTEC registered engineer. Skip a year and the manufacturer can refuse to honour the warranty on a £4k+ boiler.

Insurance Claims Refused

Home insurers increasingly ask whether the oil installation has been serviced annually and whether the tank meets BS 5410. A negative answer can be enough to reduce or refuse a claim after a leak or fire.

Higher Fuel Bills

An unserviced burner runs out of tune. A 5% drop in efficiency on a 1,000-litre annual usage is roughly £70 wasted at current kerosene prices — far more than the cost of a service.

Landlord Compliance Gap

Landlords letting properties with oil heating must keep evidence of an annual safety check on the appliance and tank. A landlord oil safety record protects you in a deposit dispute and at insurance renewal.

Sale Delayed by the Tank

Surveyors flag old single-skin tanks, undersized bunds and short fire-separation distances. Catching this before the buyer's surveyor does keeps the sale on track and the price intact.

An annual service costs less than one no-heat callout in January.

Book Your Service Today
Self-Check

Signs Your Oil Boiler or Tank Needs Attention

Not sure if you are due a service? If any of the following apply, book an OFTEC inspection.

  • !
    It has been over 12 months since the last service

    Manufacturer warranties and most home insurance policies expect annual servicing.

  • !
    The boiler is sooting up, smoking or smelling of oil

    Yellow flame, soot at the flue terminal or an oil smell near the boiler all point to bad combustion.

  • !
    The boiler keeps locking out

    Frequent lockouts usually mean a clogged nozzle, a tired pump or an air ingress on the supply line.

  • !
    You are buying or selling a property with oil heating

    A pre-purchase oil heating inspection avoids surprises at survey and gives you a paper trail at exchange.

  • !
    The oil tank is single-skin, more than 10 years old, or shows staining

    BS 5410 requires bunding for tanks above certain capacities and within 10m of a building. Aged tanks split without warning.

  • !
    You own an AGA, Rayburn or Stanley range

    Range cookers run almost continuously and need annual deep-cleaning of the burner, flueways and heat exchanger.

Book My OFTEC Service
OFTEC engineer servicing an external Worcester oil-fired boiler — burner pulled, flue analyser fitted, tools laid out
Simple Process

How Your Oil Boiler Service Works

From booking to the CD/10 in your inbox, every step is straightforward.

1

Book Online or Call

Pick a time that works for you. Book through the form, call the office or message us on WhatsApp.

2

We Service Your Installation

Your OFTEC engineer strips the burner, replaces the nozzle and oil filter, takes combustion readings and inspects the flue, the tank and the supply line against TI/133 and BS 5410.

3

Receive Your CD/10

Within 24 hours you receive a digital CD/10 commissioning and servicing certificate, plus any observations on the appliance, flue or tank.

4

Stay Compliant

Use the CD/10 for warranty, insurance, landlord obligations or a property sale. We will remind you when next year's service is due.

Our Services

Who We Work With

Whether you live with oil heating, let a property on it, or are buying one, we have the right OFTEC service for you.

Homeowners

Keep your warranty valid, your fuel bills down and your insurance intact with an annual OFTEC service. Includes burner strip, combustion test, flue check and tank inspection.

  • Annual OFTEC oil boiler service
  • CD/10 commissioning & servicing certificate
  • Tank & supply pipe inspection
Book Annual Service
Most Popular

Landlords

Keep evidence of an annual safety check on the appliance and tank for every let property. We deliver a digital landlord oil safety record and reminder schedule for your portfolio.

  • Landlord oil safety record
  • Tank check against BS 5410
  • Multi-property discounts available
Book Landlord Safety Check

Home Buyers

Know exactly what you are taking on. A pre-purchase oil heating inspection covers the boiler, the tank, the bund and the supply line — before you exchange.

  • Pre-purchase oil heating inspection
  • Tank condition & bund report
  • Negotiation leverage on findings
Book Pre-Purchase Inspection

Estate Agents

Partner with us to keep oil-heated property transactions moving. Priority booking, fast CD/10 turnaround and a single point of contact for your office.

  • Priority booking for your clients
  • 24-hour certificate turnaround
  • Dedicated account manager
Learn About Partnerships
Customer Reviews

What Our Customers Say

★★★★★

Rated 5/5 from verified Google Reviews

★★★★★

"Booked online and they were out the same week. The engineer was tidy, talked me through the combustion readings and emailed the CD/10 the next morning. Found a slow leak on the supply union I would never have spotted."

JM
James M. Homeowner, St Albans
★★★★★

"I let nine rural properties on oil heating and these are the people I use for the annual safety checks. Reliable, honest about what does and does not need doing, and the multi-property pricing actually works for a portfolio."

SK
Sarah K. Landlord, Tring
★★★★★

"We were exchanging on a country cottage and the surveyor flagged the oil tank. They came out, condition-tested it and produced a written report inside two days. Vendor agreed to replace it before completion."

DP
David P. Home Buyer, Berkhamsted
★★★★★

"Honestly thought my Rayburn was on its way out. The engineer stripped, cleaned and re-set it in a morning and it has been running cleaner than it has in years. Great communication, fair price."

LT
Linda T. Homeowner, Stevenage
Read All Reviews on Google Leave Us a Review
For Estate Agents

Keep Oil-Heated Sales Moving

Rural and semi-rural properties on oil heating routinely get flagged at survey for tank condition, bunding distances or a missing service history. Partner with us to clear those queries fast — priority booking, 24-hour CD/10 turnaround and one point of contact for your office.

  • Tank & bund condition reports for surveyors
  • Priority booking and 24-hour CD/10 delivery
  • Dedicated account manager for your agency
  • Competitive rates for referral volume
Become a Partner Agency
24hr Average CD/10 turnaround for estate agent referrals
Boilers & Tanks We Service

Trusted Manufacturers We Service Daily

Domestic oil-fired boilers, range cookers and oil tanks from every major UK manufacturer.

Grant

Oil Boilers

Worcester

Oil Boilers

Firebird

Oil Boilers

Warmflow

Oil Boilers

Trianco

Oil Boilers

Boulter

Oil Boilers

Titan

Oil Tanks

Harlequin

Oil Tanks

Atlas

Oil Tanks

Kingspan

Oil Tanks

Book Now

Book Your Oil Boiler Service

Book in under 60 seconds. No payment up front — we will confirm your appointment by WhatsApp or phone.

Call Us 01442 601 383
WhatsApp Message us now
No obligation quote
OFTEC registered engineers
CD/10 within 24 hours

Book Your Service

Please note: Annual services typically take 60–90 minutes. Range cookers (AGA, Rayburn, Stanley) take longer.

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