Boiler Servicing in Harrow
Annual boiler servicing by a Gas Safe registered engineer. Keep your boiler safe, running efficiently and covered by its warranty.
Gas Safe registered · Fully insured · 15+ years’ experience
Why service your boiler every year?
A yearly service is the simplest way to keep your home safe and avoid a cold-weather breakdown. Most problems we find on a service are small, and much cheaper to fix early.
Safety first
A service checks your boiler is burning gas safely and that fumes are leaving through the flue as they should.
Protect your warranty
Most manufacturers ask for an annual service by a Gas Safe engineer to keep the warranty valid.
Fewer breakdowns
Worn parts and early faults get picked up before they leave you without heating or hot water.
Lower running costs
A well-maintained boiler uses less gas to heat your home.
What's included in your boiler service
Every service is carried out by a Gas Safe registered engineer and includes:
- Check boiler operation and your heating and hot water controls
- Inspect the boiler casing, visible pipework and installation
- Inspect the flue, terminal and seals
- Check internal components to the manufacturer's instructions
- Clean components where the service procedure requires it
- Check for gas, water and combustion leaks
- Measure gas rate or inlet working pressure
- Flue gas analysis, with CO and CO₂ readings recorded
- Check the condensate trap and discharge pipe, where fitted
- Check system pressure, water quality and inhibitor
- Reassemble, confirm safe operation and complete your Benchmark service record
The exact procedure depends on your boiler model. Any defects or recommended repairs are noted on your service record.
If we find a fault, we’ll explain what’s wrong and what it involves before any repair goes ahead. No hidden costs, no upselling.
Boilers we service
We service all major boiler brands, including:
Landlord in Harrow?
We also provide landlord gas safety certificates (CP12) for landlords, letting agents and homeowners. Ask about it when you book your service.
Areas we cover
We service boilers across Harrow and nearby areas, including:
Why choose Thermal Glow?
- 01Gas Safe registered. Check us on the Gas Safe Register.
- 02Fully insured for your peace of mind.
- 0315+ years’ experience with boilers and heating systems.
- 04Honest, upfront pricing. No hidden costs and no upselling.
- 05Local to Harrow, so we know the area and the homes in it.
Boiler servicing FAQs
How often should I service my boiler?
Once a year. An annual service keeps your boiler safe and efficient, and is usually required to keep the manufacturer’s warranty valid.
Will a service keep my boiler warranty valid?
Most manufacturers ask for a yearly service by a Gas Safe registered engineer. We give you a written record of the service for your warranty. Check your warranty terms for the exact requirements.
Is a boiler service the same as a gas safety certificate?
No. A service keeps your boiler working well. A gas safety certificate (CP12) is a legal safety check landlords need each year for the gas appliances in a rented property. We can do both.
Do you service all boiler brands?
Yes. We service all major brands, including Worcester Bosch, Vaillant, Ideal, Baxi, Glow-worm and Viessmann.
What happens if you find a problem?
We’ll explain what we’ve found and what it involves before any repair goes ahead, so you can decide.
Book Your Boiler Service in Harrow
Call or WhatsApp Thermal Glow today to book your annual boiler service with a Gas Safe registered engineer.