Oil boiler servicing in Sligo keeps your boiler running safely, efficiently, and reliably right through the winter. JTR Plumbing & Heating provide a full annual service — cleaning, testing, and checking every part — for all makes and models across Sligo town, North Sligo, North Leitrim and South Donegal. We're a family-run, fully insured team with over 20 years keeping local homes warm.




Oil boiler servicing is a full annual check-up of your boiler to keep it running safely, efficiently, and reliably. It involves cleaning the key parts, testing how the boiler is burning its fuel, and catching faults before they turn into expensive breakdowns. Think of it like a yearly service for your car — a small, planned job that prevents big, costly problems down the line.
What does an oil boiler service actually involve?
We inspect the boiler and its controls, clean the combustion chamber and heat exchanger, replace the oil nozzle and fuel filter, check and adjust the burner for clean combustion, inspect and test the flue, check for oil leaks, and run a combustion efficiency test to make sure the boiler is burning cleanly and economically. We then check the overall heating system, confirm everything is working properly before we leave, and give you a written service record.
How often should an oil boiler be serviced?
Oil boilers should be serviced once a year, ideally before the heating season starts in autumn. A yearly service keeps the boiler efficient, helps it last longer, and catches small faults early. Skipping services is one of the most common reasons boilers break down in the middle of winter — exactly when you need them most.
What's the difference between a service and a repair?
A service is planned, preventative maintenance to stop problems before they happen, while a repair fixes a fault that has already occurred. Regular servicing greatly reduces the chance of needing a repair at all, keeps your oil bills down, and protec
ts your manufacturer's warranty, which usually requires proof of annual servicing. And if a service does turn up a fault, we can repair it for you — more on that below.
How much does oil boiler servicing cost in Sligo?
A standard oil boiler service in Sligo is a fixed-price job for most homes — and it's far cheaper than the breakdowns and call-outs it helps you avoid. Your exact price depends on the type and age of your boiler, where it's located, and whether any extra parts or work are needed on the day. We'll always tell you the price upfront before we start, so there are no surprises.
What affects the cost of an oil boiler service?
The make, model, and age of your boiler can make a difference, as older or unusual units sometimes take longer to service. Where your boiler is located matters too — an easily reached boiler is quicker to work on than one that's awkward to get at. If parts like the nozzle, filter, or seals need replacing beyond the standard service items, those may be added to the price, but we'll always explain any extra cost before doing the work.
What's included in a standard oil boiler service?
A full inspection of the boiler and controls, cleaning of the combustion chamber and heat exchanger, replacement of the oil nozzle and fuel filter, burner checks and adjustment, a flue and safety check, a combustion efficiency test, and a written service record once the job is done.
Is servicing worth the cost?
Yes — a yearly service usually pays for itself. A clean, well-tuned boiler burns less oil, so you save on fuel. It's also far less likely to break down, which saves you a costly repair and the misery of a cold house in winter. On top of that, regular servicing helps your boiler last longer and keeps your warranty valid.
How do I know my oil boiler needs a service?
The simple answer is once a year, every year — but there are also warning signs that it's overdue. We've serviced boilers all over the area, from Sligo town and Cliffoney to Grange, Drumcliff, Manorhamilton, Kinlough, Bundoran and Ballyshannon, and these are the signs we tell homeowners to watch for.
Rising oil bills. If your boiler is using more oil than usual for the same heat, it's probably running inefficiently and needs a service to bring it back to its best.
The boiler keeps cutting out or locking out. A boiler that repeatedly stops or needs resetting is telling you something's wrong — often a dirty nozzle, blocked filter, or fuel problem a service will sort.
Strange noises or smells. Banging, rumbling, or a smell of oil or fumes all mean your boiler needs attention. A smell of fumes in particular should never be ignored — turn the boiler off and call us.
Sooty marks or staining. Black or sooty marks around the boiler suggest it isn't burning cleanly, which wastes fuel and can be unsafe.
Slow or uneven heating. If your home takes longer to warm up than it used to, a service often gets to the root of it.
It hasn't been serviced in over a year. Even if it seems grand, a boiler that's gone more than a year without a service is overdue and at higher risk of an unexpected breakdown.
Do you repair oil boilers too?
Yes. As well as the annual service, JTR repair oil boilers right across Sligo, North Leitrim and South Donegal. If your boiler has stopped firing, lost pressure, started leaking, or just isn't heating the way it should, we'll find the fault and fix it properly. We'll always explain what's gone wrong and what it'll cost before we start.
What makes of boiler do you work on?
All the common makes you'll find in local homes — Grant, Firebird, Warmflow, Bosch and more. We carry the parts that fail most often, so a lot of services and repairs are sorted in a single visit.
How long does a service take?
A standard oil boiler service usually takes around 45 minutes to an hour. The exact time depends on the make, model, age, and condition of your boiler — older units or ones in awkward spots can take a little longer. If we find a fault that needs attention, we'll explain it and let you know what's involved before doing anything extra.
What happens during the service?
We inspect the boiler and controls, clean the combustion chamber and heat exchanger, replace the nozzle and fuel filter, check and adjust the burner, inspect the flue, check for leaks, run a combustion efficiency test, and confirm the whole system is working safely and efficiently — finishing with a written service record.
We're a local, family-run business with over 20 years keeping homes across Sligo, North Sligo, North Leitrim and South Donegal warm. We're fully insured, we turn up when we say we will, and we do the job right the first time. When you call JTR you get a straight answer, a fair price, and someone you can ring again year after year — which is why most of our work comes from local people recommending us to family and friends.
JTR Plumbing and Heating provides expert care for home heating systems, specialising in oil boilers, modern heat pumps, and comprehensive boiler servicing. We ensure your setup runs at peak efficiency, preventing costly breakdowns through regular inspections, professional tune-ups, and reliable repairs. We deliver quality workmanship to keep your property warm and efficient all year. We work every week with actual customers in Sligo Town, Cliffony, Ballyshannon, Enniskillen, Donegal, Killybegs, Rossnowlagh and surrounding areas.

At JTR Plumbing & Heating , we understand how much your Sligo home or business relies on heating, hot water, and proper plumbing. That's why our experienced local team is ready to help, delivering boiler, heating, and plumbing solutions quickly, tidily, and professionally.
Whether you need a new boiler, an oil boiler repair, a central heating power flush, a heat pump installation, or a full bathroom renovation, we take pride in honest advice, fair prices, and dependable workmanship. We're dedicated to keeping your home or business warm, comfortable, and running smoothly all year round.
You can rely on our local, family-run team — based in Castlegal with over 20 years of experience and fully insured — to treat your property with care and deliver the professional service you expect and deserve.
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