Gas Safe registered
Company reg. no. 552490, all engineers registered
Vaillant Advance Installer
Dan and Dean
F-Gas registered company
FGAS ID FGAS3023734
Checkatrade member
Independently vetted
Constructionline Gold
Accredited supplier
Fully insured
£5m public · £10m employers' liability
What an annual boiler service involves
A boiler service is a scheduled inspection and clean of a working appliance, carried out by a Gas Safe registered engineer. It covers the appliance's operation and safety, the combustion it is producing, the condition of its components, the flue and its termination, and the system it sits on. The point is twofold: confirm it is safe, and find the things that will otherwise fail later.
DM Heating and Cooling is Gas Safe registered under company registration 552490. Dan and Dean are Vaillant Advance Installers and every engineer in the team is individually Gas Safe registered, which is what makes the difference between a service that ticks boxes and one that tells you something useful about your boiler.
This service is for any homeowner with a gas boiler, and particularly for anyone who has recently bought a house and does not know when the appliance was last looked at, anyone whose manufacturer warranty requires annual servicing to remain valid, and anyone who has noticed the small changes that precede a failure: a longer wait for hot water, an occasional lockout, more noise than it used to make, or radiators needing bleeding more often.
The best time to book is late summer or early autumn, before the heating goes on properly. A fault found in September is an appointment; the same fault found in January is an emergency, in the week when every engineer in the area is at capacity.
Professional servicing matters because the checks that keep a gas appliance safe are not visual. Combustion, the condition of the heat exchanger, the integrity of the seals and the flue all require a registered engineer with the right instruments. We report what we find honestly: including telling you when nothing needs doing.
- Carried out by Gas Safe registered engineers
- Clear report on what we found
- Tidy work in your home
- Booked around standard working hours
Why it matters
What skipping the service actually costs
The most serious risk is the one people least like to discuss. Gas appliances that are not maintained can produce carbon monoxide, which has no smell and no taste. An annual service by a registered engineer is the established way of confirming an appliance is burning safely and venting properly.
Financially, an unserviced boiler is a slow leak. Deposits, debris and worn components make it work harder to produce the same heat, and that difference sits on every bill through the winter. When it finally fails, it fails at the worst possible moment: the first sustained cold week, when availability is thinnest and the cost of the interruption is highest.
Many manufacturer warranties require evidence of annual servicing. Missing a year can be enough to lose cover on an appliance that still had several years of protection left, and a warranty claim refused on a paperwork technicality is an expensive way to save the price of a service.
And when you come to sell or let the property, service history is part of what a buyer's surveyor or a letting agent will ask for. A gap is a question you cannot answer retrospectively.
Common mistakes we're called in to fix
- Waiting until something goes wrong instead of servicing on a schedule
- Booking in mid-winter, when availability is shortest and a fault means no heat
- Assuming a boiler that is working is a boiler that is safe
- Letting a manufacturer warranty lapse for want of an annual service record
- Using someone who is not Gas Safe registered because they are cheaper
Our process
What we do at a boiler service
- 1
Inspection
We check the appliance, its installation, the flue route and termination, and the system pressure and controls it runs on.
- 2
Diagnosis
Combustion and operation are checked and components examined for wear, so we can identify what is failing rather than what has failed.
- 3
Clean and service
The appliance is cleaned and serviced to the manufacturer's requirements, with the work carried out on protected surfaces.
- 4
Testing and verification
The boiler is run up and re-checked under load, controls tested and the system confirmed to be operating correctly.
- 5
Report and completion
You get a plain report of what we found, what needs attention and what does not, the site left clean, and our 1-year workmanship guarantee on any work we carry out.
Benefits
Why an annual service is worth booking
Safety confirmed by a registered engineer
Combustion, seals and flue checked by a Gas Safe registered company, reg. no. 552490.
Faults caught before winter
Worn components found in autumn are a planned repair, not an emergency in January.
Lower running cost
A clean, correctly operating boiler converts more of the gas you buy into heat you use.
Warranty kept valid
Annual servicing is what most manufacturer warranties require to stay in force.
Honest reporting
If nothing needs doing, we tell you nothing needs doing. We do not invent work.
Clean work in your home
Surfaces protected, mess cleared, the house left as we found it: the point our reviews mention most.
In detail
What gets checked, and how servicing differs by system
A service is not a single fixed list, it varies with the appliance and the system it sits on. Here is what that means in practice.
The appliance itself
The service covers the burner and heat exchanger, the seals and casing, the electrical connections, the gas pressure and rate, and the combustion the appliance is producing. Cleaning matters as much as checking: deposits on a heat exchanger act as insulation, so the boiler burns more gas to transfer the same heat into your system. Components that are worn but not yet failed are identified and reported, which is what turns a service into something more useful than a certificate.
The flue and ventilation
The flue has to be intact along its length and terminate in a position that safely disperses the products of combustion, clear of windows, doors and openings. Terminals get blocked, seals degrade and, in older installations, extensions and new windows sometimes change what was originally a compliant position. Checking it is part of every service.
The system around the boiler
System pressure, the expansion vessel, the pump, the magnetic filter if one is fitted, and the condition of the system water all affect how the boiler behaves. A boiler that keeps losing pressure or locking out is usually telling you something about the system rather than about itself, and a service is where that gets picked up.
Combination, system and conventional boilers
Combination boilers add the hot water side to the service: flow rate, plate heat exchanger condition and the effects of scale in hard-water areas. System and conventional boilers add the cylinder, its thermostat and, where present, the feed and expansion tank in the loft. The appliance type changes both what is checked and the common failure points to look for.
Owner-occupied homes and rented property
Homeowners service to stay safe, keep warranties valid and avoid winter failures. Landlords have legal duties in respect of gas safety in property they let, and those obligations sit with the landlord rather than the tenant. If you let a property, tell us when booking so we can confirm what is required.
Repairs found during a service
Where we find something that needs fixing, we explain it, price it and let you decide. There is no pressure and no call-out fee for the estimate, and any repair work we carry out is covered by our 1-year workmanship guarantee.
Related services
Popular areas we cover
- Boiler Servicing in Maidstone
- Boiler Servicing in Aylesford
- Boiler Servicing in Rochester
- Boiler Servicing in Snodland
- Boiler Servicing in West Malling
- Boiler Servicing in Kings Hill
See all areas we cover, browse every service, go back to the homepage, or contact us.
Where we work
Boiler Servicing across Maidstone and Medway
What customers say
Rated 9.97 out of 10
across 13 Checkatrade reviews
10/10 · New Air Conditioning Installed
"From my first enquiry to completion of works I found them to be very courteous, hard working and competitively priced. Dan carried out a full survey and gave a cost breakdown for works. A date was booked and the guys turned up on time and work was completed within the given timescale. They were very polite and tidy and even vacuumed after completion. I am so happy with my new hot/cold air conditioning unit which will enable me to work comfortably from home and sleep at night. They even sorted my dripping tap free of charge! I would highly recommend DM Heating and Cooling."
10/10 · New Combi Boiler Installation
"I had a new combi boiler installed and had my old one removed. Excellent service and a very productive team. They were helpful with boiler and thermostat advice and quick to reply. I would highly recommend their services."
10/10 · Boiler replacement
"Dean and the team were excellent. Quick response to initial issue, boiler needed replacing. All quotes explained with options. Work carried out quickly and professionally. I found them to be very reliable and trustworthy. Wouldn't hesitate to use again or recommend."
Common questions
Straight answers,
before you call
Still unsure? Call Dan on 07930 686788.
- How much does a boiler service cost?
- Call Dan on 07930 686788 or Dean on 07714 082269 and we will give you a clear price for your appliance before we book. Any additional repair work is priced and agreed separately, with no call-out fee for the estimate.
- How long does a service take?
- A routine service on an accessible boiler is usually a short appointment rather than a full day. If we find something that needs attention we will tell you there and then and price it separately.
- How often should a boiler be serviced?
- Once a year. Most manufacturer warranties require it, and it is what keeps a gas appliance operating safely and efficiently.
- When is the best time of year to book?
- Late summer or early autumn, before the heating is running constantly. Faults found then are an appointment rather than an emergency.
- Are you Gas Safe registered?
- Yes. DM Heating and Cooling is Gas Safe registered, company registration number 552490, and Dan, Dean, Owen and Jack are all individually registered under it.
- What happens if you find a fault?
- We explain what we found, tell you whether it needs doing now or can wait, and give you a price. You decide. Any work we carry out is covered by our 1-year workmanship guarantee.
- Do you service boilers you did not install?
- Yes. We service boilers regardless of who installed them, as long as they are domestic gas appliances.
- Can you come out if my boiler has broken down?
- We work standard working hours and take emergency call-outs where possible. Call Dan or Dean and we will tell you honestly what we can do and when.
- Which areas do you service boilers in?
- Maidstone and the surrounding areas, including Aylesford, Rochester, Larkfield, Bearsted, Faversham, Tonbridge, Sevenoaks and Dartford.
Book your annual boiler service
Gas Safe registered, reg. no. 552490. Honest reporting, tidy work and a clear price before we book you in.