Boiler Breakdown in a Rental: What's the Landlord's Duty?
A failed boiler in winter triggers the highest-stakes emergency in landlord operations. Here is exactly what your duty looks like.
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# Boiler Breakdown in a Rental: What''s the Landlord''s Duty?
A failed boiler in January is the highest-stakes emergency in residential lettings. Cold tenants, vulnerable household members, frozen pipes, and a compliance clock all converge in 24 hours.
The legal duty
Section 11 of the Landlord and Tenant Act 1985 requires the landlord to keep "installations for space heating and water heating" in repair and proper working order. This is non-excludable in any tenancy under 7 years.
The Homes (Fitness for Human Habitation) Act 2018 adds direct tenant standing to sue if the property becomes unfit — and a property with no heating in winter is unfit.
Awaab''s Law (extended to private rented via the Renters'' Rights Act) sets a 24-hour emergency response for category 1 hazards. No heating in winter qualifies.
Triage the call
When a tenant reports a boiler failure:
- Acknowledge within minutes.
- Confirm: no heating, no hot water, or both? Pressure normal? Error code?
- Walk them through basic resets:
- Pressure 1–1.5 bar (top up with filling loop if low).
- Reset button held for 5 seconds.
- Check thermostat and timer.
- Check gas supply is on.
- If still not working, dispatch a Gas Safe engineer.
About 30% of "broken boiler" calls are user error or pressure issues — solved on the phone.
Dispatch the engineer
- Gas Safe registered only — verify on gassaferegister.co.uk.
- Pre-agreed callout rate and authorisation limit.
- Confirm ETA in writing to tenant.
- Brief: diagnose, quote, and where possible fix on the visit.
Temporary heating
If repair is not same-day:
- Supply electric oil-filled radiators — keep two in the void cupboard if you own multiple properties; otherwise next-day delivery.
- One radiator per occupied room.
- Cover the tenant''s additional electricity cost (typically £5–£15/day per radiator).
- For vulnerable tenants (elderly, infants, ill health), consider a hotel or B&B for one or two nights. Awaab''s Law makes this an expected part of "make safe".
Repair or replace?
Rule of thumb:
| Boiler age | Repair cost | Decision |
|---|---|---|
| <8 years | Any | Repair |
| 8–12 years | <£300 | Repair |
| 8–12 years | >£500 | Quote replacement |
| >12 years | >£300 | Replace |
| >15 years | Any | Replace |
A modern combi boiler costs £2,000–£3,500 fitted and lasts 12–15 years. A 12-year-old boiler accumulating repairs is throwing good money after bad — and approaching efficiency obsolescence.
Replacement specification
- Combi for 1–2 bath properties; system boiler with cylinder for 3+ baths or simultaneous demand.
- A-rated efficiency (90%+ ErP).
- Mainstream brand (Worcester Bosch, Vaillant, Ideal, Baxi) — parts everywhere.
- 8–10 year manufacturer warranty (often subject to annual service).
- Magnetic filter added on installation — extends life of next boiler.
- Smart thermostat if budget allows (Hive, Nest, Tado).
Gas safety obligations
A new boiler triggers:
- Commissioning certificate.
- Benchmark logbook entry.
- Gas Safety Record before next anniversary.
- Building control / FENSA-equivalent (Gas Safe notification to the council is automatic from the engineer).
- Annual service to maintain warranty.
Annual service
- £80–£120 per visit.
- Schedule with gas safety check (combined £100–£150).
- Maintains warranty.
- Spots wear before failure.
- Required by most manufacturer guarantees.
Landlord boiler cover
- £15–£25/month per boiler for landlord-specific cover (British Gas Homecare, HomeServe, CORGI HomePlan).
- Includes annual service plus breakdown response.
- Often includes parts.
- Worth it for older boilers and remote landlords.
For portfolios, in-house contractor on retainer often beats branded cover.
Documentation
- Time tenant reported.
- Time engineer dispatched and arrived.
- Diagnosis and quote.
- Repair or replacement decision and reasoning.
- Photos.
- New commissioning paperwork.
- Communication trail with tenant.
When the tenant caused it
Common: pressure not maintained, freeze damage from off-heating during void, debris in system. Investigate before blame. If clearly tenant-caused (smashed flue, tampering), recover from deposit with evidence.
Common mistakes
- Sending a non-Gas Safe handyperson.
- Resetting and ignoring repeated faults.
- Repairing repeatedly on a >12-year boiler instead of replacing.
- No temporary heating provided.
- Slow response on a vulnerable household.
- Skipping annual service to save £100.
- Forgetting to update Gas Safety Record after new install.
Bottom line
Heating duties are absolute. Respond within 24 hours, provide temporary warmth, send a Gas Safe engineer, replace rather than repeatedly patch ageing boilers. Done well, an annual service plus a £20/month cover policy turns the highest-stakes emergency into a routine event.
Frequently asked questions
How quickly must I respond to a broken boiler in winter?+
Within 24 hours under Awaab's Law — including providing temporary heating.
Do I have to provide electric heaters?+
Yes — until the boiler is repaired. Cover the tenant's additional electricity reasonably.
Should I pay for a hotel?+
For vulnerable tenants (elderly, infants, ill health), or where repairs will exceed Awaab timescales, yes — increasingly an expected part of make-safe.
Can I send a handyperson to look at a boiler?+
No — Gas Safe registered engineer only.
When should I replace rather than repair?+
Any repair over £300 on a 12+ year boiler, or over £500 on an 8–12 year boiler.
Does the tenant have to give access?+
Yes — with 24 hours' notice for non-emergencies. Emergencies justify shorter notice.
What annual service costs should I expect?+
£80–£120, or £100–£150 combined with the gas safety check.
Is landlord boiler cover worth it?+
For older boilers and remote landlords often yes. For new boilers with manufacturer warranty, less critical.
Will my insurance cover a boiler replacement?+
Generally no — boilers are wear and tear. Boiler-specific cover or warranty is the route.
What is the lifespan of a modern combi?+
12–15 years with annual servicing. Plan replacement around year 12–14.
Can I claim boiler replacement as a repair?+
Like-for-like replacement of a worn boiler is a revenue repair (deductible). Upgrading to a significantly higher-spec system is partly capital.
What is a magnetic filter and do I need one?+
A small device fitted to the central heating return that captures iron oxide. Extends boiler life significantly — fit one on every new installation.
Get the tools to handle this confidently
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