Boiler Breakdown Cover UK: What Is Included and How to Compare

What Is Boiler Breakdown Cover?

Boiler breakdown cover is an insurance product that pays for emergency repair or replacement of a domestic boiler and, in many cases, the central heating system, when they fail due to mechanical or electrical breakdown. It is regulated by the FCA as a general insurance product.

Cover is typically structured as either standalone boiler-only cover, which covers the boiler unit and its controls but not the wider heating system, or a combined boiler and central heating policy, which extends coverage to radiators, pipework, thermostatic radiator valves and associated system controls.

Some policies also include an annual boiler service as a policy benefit. The Gas Safe Register, operated under contract with the Health and Safety Executive (HSE), maintains the list of businesses and individuals legally permitted to work on gas appliances in Great Britain, the Isle of Man and Guernsey. Any work on a gas boiler must be carried out by a Gas Safe registered engineer, and most policies specify this as a contractual requirement.

A boiler replacement in the UK commonly costs £1,500 to £3,500 depending on boiler type, heating system configuration and installation complexity. For a household that has not replaced its boiler in 10 or more years, this represents a significant unplanned expenditure. Boiler breakdown cover addresses this risk for a predictable monthly or annual premium.

What Boiler Breakdown Cover Typically Includes

Based on standard FCA-authorised policy wording and Financial Ombudsman Service published case decisions, the following represent standard inclusions in boiler breakdown cover.

Boiler repair: the primary benefit is callout, parts and labour for repairing a boiler breakdown, carried out by a Gas Safe registered engineer. Most policies set a per-repair claim limit commonly between £500 and £1,500. Parts must be available and the repair technically feasible; where a boiler manufacturer has discontinued a part, settlement may shift to a replacement contribution.

Boiler controls: thermostats, programmers, timers and wireless heating controls are typically included as part of the boiler system and covered under the same claim limit.

Central heating system under combined policies: pipework connecting the boiler to radiators, radiators themselves, thermostatic radiator valves (TRVs), the circulation pump, expansion vessel, pressure relief valve and associated system controls. The heating system components are typically subject to the same per-claim limit as the boiler.

Annual boiler service under some policies: a Gas Safe registered engineer visit to service the boiler, check for safety issues and verify correct operation. The HSE's guidance on gas safety emphasises annual servicing; some insurers include this as a policy benefit while others make it a condition of cover.

Boiler replacement contribution under premium policies: where the engineer determines that repair is uneconomical, typically defined as repair cost exceeding the boiler's current market value, some premium policies provide a cash contribution toward a new boiler. This contribution is typically £200 to £500 and is not sufficient to cover full replacement cost.

Emergency heating provision: some policies provide a contribution toward temporary electric heaters during a repair period, capped at £50 to £150. This benefit is most relevant during cold weather when a boiler failure poses risk to vulnerable occupants.

Common Exclusions and Pre-Purchase Checks

The Financial Ombudsman Service identifies boiler age and pre-existing condition exclusions as the most common sources of complaint in the boiler cover product category.

Boiler age limits: most policies exclude boilers over 10 or 15 years old. The age is measured from the boiler's installation date or manufacture date, which can be found on the boiler data plate. Some providers impose this as an absolute exclusion; others will accept older boilers following an engineer inspection at additional cost.

Service history requirements: policies commonly exclude breakdowns on boilers that have not been serviced by a Gas Safe registered engineer within the previous 12 months. This exclusion has become more commonly enforced following updated HSE guidance. Policyholders should retain boiler service records as evidence.

Pre-existing conditions: any fault present at the policy start date, or that the policyholder was aware of, is excluded. A boiler that has been making unusual noises or intermittently failing before the policy commenced would typically not be covered for a resulting breakdown claim.

Non-standard and incompatible systems: oil-fired boilers, LPG boilers, electric heat pumps, biomass boilers and back boilers behind fires are not covered under standard gas boiler policies and require specialist products. The Energy Saving Trust publishes guidance on heat pump types and installation requirements.

Scaling, sludge and corrosion: hard water limescale accumulation in the heat exchanger and central heating sludge in the pipework and radiators are maintenance issues rather than sudden breakdowns. The Building Engineering Services Association (BESA) recommends power flushing for older heating systems. Some policies exclude damage attributable to sludge or scale entirely; others require evidence of a recent system flush.

Cosmetic and external components: the boiler casing, flue terminal caps and decorative items are not covered. Flue replacement, where required as part of a repair, is covered in most policies.

Gas Safe Register and Legal Requirements

Any gas work carried out under a boiler breakdown policy, or outside it, must be performed by a Gas Safe registered engineer. The requirement is set out in the Gas Safety (Installation and Use) Regulations 1998 and applies to all work on gas fittings, appliances and flues in domestic and commercial properties.

The Gas Safe Register is publicly searchable at gassaferegister.co.uk. Policyholders can verify that the attending engineer is registered, check which gas work types they are qualified to carry out, and report concerns about unsafe gas work. Each Gas Safe engineer carries an ID card showing their registration number and the categories of work they are qualified to undertake.

Insurers using subcontracted local engineers are responsible under their duty of care for verifying that the contractor is Gas Safe registered and qualified for the specific type of work. The FOS has upheld complaints where insurers dispatched unregistered contractors, holding the insurer liable for resulting damage and any remediation costs.

Landlords have specific obligations under the Gas Safety (Installation and Use) Regulations 1998 to ensure an annual gas safety check is carried out by a Gas Safe registered engineer on all gas appliances and flues. Boiler breakdown policies for landlords typically include the annual gas safety certificate as a covered service, though this should be confirmed in the policy schedule.

New Boiler Costs and When Replacement Makes More Sense

Understanding when repair is preferable to replacement is useful context for assessing boiler breakdown cover. The Energy Saving Trust and heating engineers commonly apply the following guidance.

The 50% rule: if the repair cost exceeds 50% of the current market value of the boiler, replacement is generally preferable. A 12-year-old boiler with a current market value of £400 that requires a £300 repair would meet this threshold.

Boiler efficiency and running costs: boilers manufactured before 2005 are unlikely to be condensing boilers and will have seasonal efficiency ratings below 80%, compared to 90% or above for modern condensing boilers. The Carbon Trust estimates that replacing a G-rated boiler (less than 70% efficiency) with a modern A-rated condensing boiler can reduce heating bills by 20 to 30% annually. Where a boiler is old and inefficient, ongoing repair costs may be better directed toward replacement.

New boiler costs: a replacement combi boiler supply and installation typically costs £1,500 to £2,500 for a standard installation. A system boiler replacement typically costs £1,800 to £3,000. Heat pump installations, which are eligible for the Bosch Heat Pump Grant scheme under the Boiler Upgrade Scheme administered by Ofgem, attract a government grant of £7,500, reducing the net installation cost.

The Boiler Upgrade Scheme: Ofgem administers the Boiler Upgrade Scheme, which provides vouchers of £7,500 for air source heat pumps and £7,500 for ground source heat pumps, redeemable through an MCS-certified installer. Information is available at ofgem.gov.uk/check-if-energy-grant-available-you-great-british-insulation-scheme.

Boiler breakdown cover does not typically contribute meaningfully toward full replacement cost. Its primary value is in covering the cost of repairs on a boiler that remains economically repairable, during the period between the end of the manufacturer guarantee and the decision to replace.

How to Compare Boiler Breakdown Policies

Claim limit per incident: a high per-incident limit of £1,500 or more is the most important coverage factor for most households. Most boiler repairs fall between £150 and £800; a per-incident limit of £500 may be insufficient for complex repairs involving heat exchanger or gas valve replacement.

Boiler age acceptance: providers vary in the maximum boiler age they accept. Some accept boilers up to 15 years old; others cap at 10. If the boiler is over 10 years old, a smaller number of providers will offer cover, typically at higher premium.

Response time commitment: standard policies offer next-day or 48-hour attendance; premium policies guarantee same-day or four-hour response. In November to February, when boiler failures are most common, the difference in response time has material impact. Check whether the response commitment is contractual and whether it applies at weekends and bank holidays.

Service inclusion and conditions: policies that include an annual service provide additional value by satisfying the service requirement for continued cover, maintaining boiler warranty where applicable, and improving boiler efficiency. Where a service is a condition rather than a benefit, ensure it can be scheduled within the policy requirements.

Excess structure: policies with no per-claim excess are preferable for households with older boilers or a history of claims, at the cost of higher premium. Where the excess is £100 or more per claim, this should be factored into the total cost of ownership assessment.

FCA authorisation: verify at register.fca.org.uk that the provider holds appropriate permissions before purchasing. Unresolved complaints can be escalated to the FOS at no cost to the consumer.