Find a verified Oil Boiler Repair in Ireland
Oil boiler not firing or noisy? OFTEC-registered engineers diagnose and fix faults across all major brands.
What does a oil boiler repair do?
Oil boiler repair covers diagnosing and fixing faults on oil-fired boilers — from no-start lockouts to noisy operation, smoke from the flue, oil smells, and erratic firing. Common faults include nozzle blockages, photocell sensor failure, dirty burner heads, contaminated fuel, failing oil pumps, and air locks in the oil line. Oil repair work in Ireland should be carried out by an OFTEC-registered technician.
Unlike gas, oil systems have a few additional failure modes — fuel quality, water in the tank, line air-locks — that require separate diagnostic skills. A skilled OFTEC tech will diagnose and fix most lockout faults in a single 60–90 minute visit. Parts (nozzles, filters, photocells, pumps) are widely van-stocked. Major part replacement (heat exchanger, controls) typically requires an order with 1–3 day lead time.
Common oil boiler repair services
From routine fixes to bigger projects — here's what Irish oil boiler repairs on Jobiit typically handle.
- Lockout fault diagnostic
- Nozzle blockage clear or replace
- Photocell replacement
- Burner head clean
- Oil pump replacement
- Air lock purge from oil line
- Smoke and CO emissions tuning
- Heat exchanger clean
- Control box / sequence controller swap
- Tank water removal and fuel polish
How much does a oil boiler repair cost in Ireland?
Indicative pricing — your actual quote will vary
Oil repair pricing ranges by fault complexity. The figures below cover diagnostic plus a typical single-fault repair.
A standard diagnostic callout runs €100–€160, usually offset against the repair cost. Simple repairs — purge an air lock, clear a nozzle, replace a photocell — total €140–€260. Mid-complexity repairs — pump replacement, control box swap, burner overhaul — run €280–€520. Tank water removal and fuel polish (after fuel contamination) is €350–€700 depending on tank size and how much oil needs filtering or pumping out. Heat exchanger replacement on an older boiler is €700–€1,300 fitted.
These are indicative ranges based on typical Irish jobs. Final pricing depends on scope, materials, urgency, and the trader you choose. On Jobiit you'll receive itemised quotes (labour, materials, VAT) so there are no surprises.
Why hire your oil boiler repair through Jobiit
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Oil Boiler Repairs across Ireland
Jobiit covers the whole of Ireland. Wherever you are, local oil boiler repairs are quoting on jobs near you.
- Dublin
- Cork
- Galway
- Limerick
- Waterford
- Drogheda
- Swords
- Dundalk
- Bray
- Navan
- Kilkenny
- Sligo
Oil Boiler Repair FAQs
Why does my oil boiler keep locking out?
The most common cause is a worn or blocked nozzle giving a poor flame pattern, followed by a dirty or failing photocell that incorrectly reports flame failure. Other causes: contaminated fuel (water from condensation in the tank), an air lock in the oil line, a failing oil pump, or a failed control box. A diagnostic visit identifies the cause within 60 minutes. Don't keep resetting — repeated lockouts often worsen the underlying issue.
Is black smoke from the flue dangerous?
Visible black smoke means incomplete combustion — wasted fuel and elevated CO emissions. It's a sign the burner needs urgent cleaning, the nozzle is wrong size or blocked, or the air-fuel ratio is mis-tuned. It is not immediately life-threatening if your CO alarm is silent, but persistent smoke shortens boiler life and risks soot ignition in the flue. Book service or repair within days, not weeks.
Do I need a different technician for oil vs gas?
Yes — gas work is RGI-regulated, oil work is OFTEC-recognised, and the qualifications are separate. Many technicians hold both. If you're searching for help, ask whether they're OFTEC registered for oil work. Many plumbers handle the heating-side pipework but call in an OFTEC tech for boiler-specific repairs.
What if there's water in my oil tank?
Water gets into oil tanks through condensation, leaking fill caps, or rainwater ingress on damaged tanks. It pools at the bottom (water is denser than oil), gets sucked into the line, and causes lockouts and corrosion. The fix is a tank water removal: pumping the contaminated bottom layer out, polishing the remaining oil through a filter, and addressing the cause (replace cap, fix rain damage). Cost is typically €350–€700.
When is repair not worth it?
If a boiler is over 12 years old and a major component (heat exchanger, control box on a model with no available spares) fails, repair often approaches the cost of replacement. Add the running cost difference — old units run 70–80% efficient vs 90%+ on new — and replacement usually makes more sense within 2–3 winters. An OFTEC tech can run replace-vs-repair numbers using your fuel bills.
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