Open 24/7 · 7 days a week info@btdplumbingheating.co.uk 07920 042880 HomeAboutServices Service Areas Our WorkReviewsContact07920 042880 Boiler servicing across Wiltshire # Gas boiler servicingby a Gas Safe engineer you can actually get hold of A full, manufacturer-spec gas boiler service, combustion analysed, safety devices tested, everything written up on a report, carried out by a Gas Safe registered engineer with eighteen years on the tools. Request a Free Quote 07920 042880 Gas Safe 529962 · Engineer 6073839 · Written service report · Warranty stays valid - Home - Services - Gas Boiler Servicing - 529962 Gas Safe reg. - 6073839 Engineer reg. - 18 years Experience - Mfr. spec Service to - Free Written quote Overview ## A straight explanation of what we do, and why it matters A proper annual gas service isn't about ticking a box; it's what keeps the boiler running efficiently, quietly and safely, and it's what keeps the manufacturer's warranty in force. Back to home What it isA full Gas Safe service to manufacturer specification, combustion analysis, gas rate check, safety device tests, condensate trap and PRV inspection, controls verification and a written service report to keep on file. Who it's forHomeowners, landlords and businesses across Royal Wootton Bassett, Swindon, Wroughton, Lyneham, Broad Town, Broad Hinton, Calne, Marlborough and Yatesbury, every UK gas boiler brand. When you need itEvery 12 months. Ideally in late summer or autumn before winter demand kicks in. Sooner if the boiler is losing pressure, banging, cycling on and off or the flame is anything other than steady and blue. Why professional mattersCombustion drift, condensate blockages, weeping PRVs and worn seals build up quietly all year. A service catches them before they turn into a breakdown, a warranty rejection or, at worst, a carbon monoxide incident. The cost of leaving it ## What happens when it's ignored Skipped services don't announce themselves, until the boiler does, on the coldest week of the year. Risks & escalations - Blocked condensate traps freeze in cold snaps and lock the boiler out just when you need it most. - Poor combustion produces carbon monoxide. A CO alarm is essential but a serviced boiler is the first line of defence. - Warranty terms require annual servicing on record, miss one and a major repair claim can be refused. - Small leaks, weeping valves and expansion-vessel decline all compound. Cheap to fix at a service, expensive to fix as an emergency. - Landlords have a legal duty under the Gas Safety (Installation and Use) Regulations 1998 to arrange annual gas safety checks (CP12). Common mistakes - Booking a 'boiler check' with someone who isn't Gas Safe registered. Illegal, uninsured, and worthless on your warranty. - Skipping a year 'because it seems fine'. Combustion problems are invisible without an analyser. - Ignoring low-pressure warnings. Repeatedly topping up hides a leak that gets worse each week. - Leaving flueing checks off the service. Blocked or misaligned flues are a serious safety issue. Book it once a year, get it done properly, and you'll rarely think about your boiler in between. Our process ## A clear, five-step system, no surprises - Step 1 Boiler and system inspection Visual checks, pressure reading, controls, flue route and condensate route | before anything is touched. - Step 2 Casing off, internal checks Burner, heat exchanger, seals, condensate trap, sensors, fans and expansion vessel checked and cleaned as required. - Step 3 Combustion analysis Electronic flue gas analyser reading | CO, CO2, ratio and efficiency | recorded against manufacturer spec. - Step 4 Safety device testing Overheat stat, flame failure, PRV, gas leak-tightness test and interlocks all verified. - Step 5 Written service report A full report handed over | everything checked, everything found, everything replaced. Warranty stays fully valid. The benefits ## Concrete outcomes, not vague promises Gas Safe compliance Serviced by a Gas Safe registered engineer to the standard your warranty and insurer require. Safer combustion Analyser-verified CO and CO2 | the surest defence against carbon monoxide and inefficient burn. Cheaper to run A boiler working at manufacturer efficiency uses less gas than one drifting quietly out of spec. Fewer winter breakdowns Condensate, PRV and pressure checks catch the faults that otherwise strand you in December. Longer boiler life Regular servicing routinely adds years to modern condensing boilers. Warranty protected A written service report, on time, is exactly what the manufacturer's small print asks for. In detail ## The technical stuff, explained straight Where the theory meets the van. Materials, methods, brand differences and the specific situations we deal with week in, week out across Wiltshire. ### What a proper gas service actually covers It starts before the case comes off, flue termination and route, condensate route and fall, external pipework and any signs of leaks, staining or heat damage. Inside: burner and heat exchanger inspection, condensate trap emptied and refilled, gasket and seal checks, fan and pressure switch verification, ignition and flame sensing electrodes. Combustion is then measured with an electronic analyser and compared against the manufacturer's published values, CO, CO2, oxygen and CO/CO2 ratio. Gas rate is checked at the meter. Safety devices are tested, overheat, flame failure, PRV, gas leak-tightness. Every reading and every finding is written up on the service report. ### Boiler brands we service Every major UK gas boiler brand: Worcester Bosch, Vaillant, Ideal, Baxi, Alpha, Viessmann, Glow-Worm, Potterton, Main, Ferroli and older Ravenheat and Halstead units. Combi, System and Regular layouts. Modulating and non-modulating controls. We carry brand-specific service parts and know each family's common failure points, Worcester Bosch condensate traps, Vaillant expansion vessels, Ideal ignition leads and PCB behaviours, Baxi diverter valves. Experience turns a two-hour service into a genuinely useful one. ### Landlord Gas Safety Certificates (CP12) If you're letting a property in England, you are legally required to have a Gas Safety Record (CP12) carried out every 12 months by a Gas Safe registered engineer, covering the boiler, any gas hobs, cookers, fires, meter, pipework and appliances installed. We provide certificates on completion, copies for the tenant, and can service the boiler at the same visit to save time and cost. ### Combi, System and Regular boilers | what changes The core service is the same, but each layout has its own extras. Combis: diverter valve health, DHW plate heat-exchanger scale, pre-heat function. System: expansion vessel pressure, unvented cylinder discharge on G3 systems where applicable, secondary controls. Regular / conventional: feed and expansion tanks, motorised valves, cylinder stat, immersion. We check what your system actually has, not a one-size-fits-all list. ### Signs your boiler needs a service before the annual due date Pressure drops week to week; boiler locks out on cold mornings; noticeable 'kettling' or banging noises; visible discolouration around the case; condensate blowing steam outside; radiators taking longer to warm than they used to; yellow rather than blue flame on the visible burner. Any of those and we'd get to you before the anniversary. FAQs ## The questions we're asked most Can't see yours? Give us a ring; we don't do sales scripts. Call 07920 042880 How much does a gas boiler service cost?Pricing depends on the boiler, location and whether it's combined with a landlord CP12 or additional work. Every service comes with a free written quote up front. How long does a gas boiler service take? Are you Gas Safe registered? Will my warranty still be valid? Do you service boilers you didn't install? How often should a gas boiler be serviced? Can you do a landlord gas safety check at the same visit? What happens if you find a fault? Do you cover my area? Can I book an emergency call-out if my boiler has failed? Free written quote · no pressure ## Get your gas boiler serviced properly, before it gets cold. Book now, get a free written quote, and have one less thing to worry about this winter. - Gas Safe 529962 - OFTEC C11108 - 18 years' experience 07920 042880Request a Free Quote Related services ## Often booked alongside Gas Boiler Servicing All services Gas Boiler Repairs Gas Boiler Installation Central Heating Systems Oil-fired heating specialists and fully qualified gas engineers, serving Broad Town and rural Wiltshire since 2007. Leave a review ### Services - Oil Boiler Servicing - Oil Boiler Repairs - Oil Boiler Installation - Gas Boiler Servicing - Gas Boiler Repairs - Gas Boiler Installation - Water Softener Installation - Central Heating Systems - All services → ### Service Areas - Broad Town - Royal Wootton Bassett - Broad Hinton - Lyneham - Wroughton - Marlborough - Yatesbury - Swindon - Calne ### Contact - 07920 042880 - info@btdplumbingheating.co.uk - Pye Lane, Broad Town, Swindon, SN4 7RRGas Safe Reg. 529962 OFTEC Reg. C11108 · Tech. 28212 City & Guilds Qualified Grant UK G1 Approved Installer © 2026 BTD Plumbing & Heating. All rights reserved. AboutContactPrivacyTermsCookiesOpen 24/7 · Mon–Sun Call NowRequest Quote