Gas & Boilers
Boiler Service in Watford & Hertfordshire
A yearly service keeps your boiler running safely and efficiently, and catches small problems before they turn into breakdowns.

During a service we check that the boiler is burning gas safely and efficiently, clean and inspect the parts that need it, and test the safety devices. We look at the flue, the seals and the condensate pipe, and check the system pressure and controls.
Most manufacturers ask for an annual service to keep the boiler's warranty valid, so it is worth booking every year. Autumn is popular, so it helps to book early.
What a boiler service includes
- Checking gas pressure and burner operation
- Flue gas analysis to check the boiler is burning safely
- Inspecting and cleaning key components
- Checking seals, the flue and the condensate pipe
- Testing safety devices and controls
- A service record for your paperwork
From our jobs
Boiler Service we have done
Real photos from MJ Services jobs, not stock images.



Book a service if
- It has been more than a year since the last one
- The flame looks yellow rather than blue
- The boiler is making new noises
- You have moved into a home with an unknown service history
- You want to keep the manufacturer's warranty valid
What affects the price
A standard service is a fixed price for most boilers. If we find a part that needs replacing, we explain why and agree the cost with you before doing anything extra.
“A helpful & efficient service from Selvin, who fitted in our boiler service quickly, arrived on time, and was all done in an hour.”
Nina MoxonBoiler serviceHow it works
Three steps, no surprises
Tell us what you need
Call or send an enquiry. We look at the job and your existing system, and talk through what you want.
Written quote
You receive a clear quote with the price and a start date. Nothing begins until you agree it.
Work and handover
We do the work carefully, test everything, tidy up and show you how it all works.
Questions
Boiler Service: common questions
How often should a boiler be serviced?
Once a year. An annual service keeps the boiler safe and efficient, and most manufacturers need it to keep the warranty valid.
How long does a boiler service take?
Usually about an hour, depending on the boiler and what we find.
Can you service my boiler and do the landlord certificate at the same visit?
Yes. Landlords often book both together, which saves a second visit and arranging access twice.
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Get a free quote for boiler service
Tell us about the job and we will send you a free written quote.
- Gas Safe registered, no. 528469
- Free written quote before any work starts
- Rated 4.9 from 85 Google reviews
- Or call us on 07908 257410
