Annual boiler servicing and safety checks from Gas Safe registered engineers. Keep your boiler running efficiently, protect your manufacturer warranty and keep your home safe.
Our Services
Boiler Servicing
OUR ACCREDITATIONS
About This Service
Your annual boiler service in Coventry
JLN Plumbing & Heating carries out boiler services in Coventry and nearby for homeowners and landlords. We're a family-run heating team based in Coventry, serving Balsall Common, Burton Green, Hampton in Arden and the surrounding area.
Our Vaillant Advance Plus and Worcester Bosch-accredited engineers use calibrated combustion analysers, flue cameras and manufacturer-specified spares, and follow the manufacturer's checklist for your boiler. That protects your warranty and gives you measured proof that your boiler is burning safely.
Why service your boiler every year? A boiler burns fuel inside your home every day. Over a year, burners clog, seals harden and flues can shift or block, and you won't see any of it until something goes wrong. A yearly service catches these problems early, keeps the boiler burning cleanly and efficiently, and lowers the risk of carbon monoxide.
How often? Most manufacturers ask for a service every 12 months to keep the warranty valid, and that's what we recommend for every boiler, new or old. If you rent out a home, the law also requires a gas safety check every year.
Here's what's included in every boiler service:
- Visual inspection of the boiler, pipework and casing for leaks, corrosion and wear
- Gas pressure and gas tightness checks
- Combustion analysis, measuring carbon monoxide, carbon dioxide and efficiency
- Flue and terminal inspection, with a flue camera where needed
- Burner, heat exchanger and electrodes checked and cleaned as needed
- Seals, condensate trap and pipe checked for leaks and blockages
- Safety devices, system pressure, expansion vessel and controls tested
- A full heating cycle run, then a stamped service certificate and a written record of the readings
Our boiler service checklist explains each of these checks in more detail.
How much does a boiler service cost? The price depends on the type of boiler you have (combi, system or conventional, gas or oil), how easy it is to reach, and whether the engineer finds worn parts that need replacing. We don't carry out extra work without asking: if the service turns up a fault, we explain it and give you a written quote for the repair first.
Many of our customers spread the cost with our Boiler Service Scheme, at £7.50 a month over 12 monthly payments. It covers your full annual service and safety check, a reminder when it's due, and the paperwork that keeps your manufacturer's extended warranty valid. Oil boilers are covered by our Oil Boiler Service Scheme at £15 a month plus parts. You'll find the details on our Service Scheme page.
Book in the summer if you can. It's a quieter time of year, so it's easier to get an appointment that suits you, and any fault is found and fixed before you need the heating in the autumn.
Our Process
How It Works
Book & Pre-check
Arrange an appointment and we confirm make, model and any manufacturer requirements so the right parts and instruments come on the visit.
Service & Safety Tests
Engineer completes strip-down checks, flue inspection, combustion analysis where applicable and replaces worn parts with manufacturer‑specified spares.
Certification & Advice
You receive a stamped service certificate, written report and practical advice to keep your system safe and warranty-compliant.
Benefits
What you get when we service your boiler
Manufacturer‑compliant servicing
We follow Vaillant Advance Plus and Worcester Bosch-approved procedures, using the parts and settings the manufacturer specifies, so your warranty stays protected.
Safety and verified performance
Gas Safe registration, calibrated combustion analysis and flue-camera checks give measurable proof your boiler is burning safely and efficiently.
Local, reliable engineers
Family‑run team based in Coventry with 19 years' experience, fast parts deliveries and priority response for service-plan members.
Small faults found early
A proper service is more than a quick look. Our engineers strip down and test the parts that wear, so small faults are spotted and quoted for before they leave you without heating or hot water.
FAQ
Frequently Asked Questions
Yes. Most manufacturers require annual servicing by a competent, approved engineer to maintain warranty cover. We follow manufacturer checklists, use specified spares where needed and complete the paperwork that proves compliance.
Combustion analysis measures how cleanly your boiler burns gas and checks the levels of carbon monoxide and carbon dioxide in the flue gases, along with efficiency. It confirms safe combustion and picks up issues that can cause carbon monoxide or reduced performance.
Most domestic boiler services take around 45–90 minutes depending on access and the system's condition. If additional repairs or parts are needed we’ll explain options and timescales before continuing.
Our team is experienced with leading makes including Worcester Bosch and Vaillant and many other manufacturers. Where manufacturer accreditation applies we follow the maker’s service procedures to protect warranties.
It depends on your type of boiler, how easy it is to reach and whether any parts need replacing. Our Boiler Service Scheme spreads the cost at £7.50 a month over 12 monthly payments and includes your annual service and safety check. Tell us your boiler's make and model when you get in touch and we'll give you a price as you book.
Yes. JLN provides fast response for breakdowns and priority support for service-plan members. If an urgent fault appears we aim to diagnose quickly and carry out urgent repairs or arrange parts same‑day where possible.
What our customers say after a service
"Craig Tonks carried out our annual boiler and gas fire service, he picked up small fault in boiler, and arranged for repair by manufacturer on warranty, whose Engineer said most gas engineers would have missed it, he was very impressed. This is why we wouldn't use anyone but JLN, thanks Craig, see you next year" - eileen, Google
"Annual boiler service. Easy & effective booking online. JLN completed the job in their usual friendly & efficient manner. One can ask no more." - Tom, Google
Ready to book your annual boiler service?
Protect your warranty and keep your home safe. Tell us your boiler's make and model and we'll arrange a Gas Safe service at a time that suits you. Our office is open Monday to Friday from 8am to 5pm, and Saturday from 9am to 1pm.
REVIEWS
What Our Customers Say
“Great service by Brendan today, thanks”
— steve stvcarroll3
Google2026-06-09“Great business. Professional service. Would thoroughly recommend.”
— Jon Sheppard
Google2026-06-09“What great lads, it was a pleasure to have them in the house. They worked solidly and did an amazing job. I would 100% recommend them!”
— Hannah
Google2026-06-09“Fast response and quality work. The plumber knew exactly what the problem was and fixed it within a short time. Highly recommended service.”
— Mia Peterson
Google2026-06-09“Excellent service and price through out works
Definitely use this company”
— lammy1100
Google2026-06-09“I have used JLN Plumbing for years. They are reliable, professional, friendly and efficient plumbers. They are not pushy to change anything unnecessary and always give most cost effective advice. I highly recommend them.”
— A Guardino
Google2026-06-09“I recently had my combi boiler serviced by Brendan from JLN. He was prompt, professional, attentive and friendly. He thoroughly checked over the boiler system and left my kitchen immaculate afterwards. From the start of the process to Brendan's visit, JLN have been excellent. Highly recommend the team. Thank you to them and Brendan!”
— Counselling Warwickshire - Jenny
Google2026-06-09“Craig Tonks did our Boiler Service , he was incredibly knowledgeable ., and very helpfull. Briliant Job .
regards,
Steve Draper”
— Stephen Draper
Google2026-06-09“Craig came out at very short notice to look at an issue with our boiler. He was very polite and timely, and explained the issue that he found and the steps needed to fix it. Would recommend”
— James King
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