Boiler Not Firing Up in Bexleyheath Rental Properties - Common Causes and Who Is Responsible

Published October 2026 | Boiler Repair

Landlord Obligations Under Current Regulations

Boiler repairs in rental properties are, in the vast majority of cases, the landlord's legal duty. Section 11 of the Landlord and Tenant Act 1985 requires landlords to keep all installations for space heating and hot water in proper working order. When a boiler stops firing up, the obligation to fix it doesn't rest with the tenant.

The legal framework covering this goes further than the 1985 Act alone:

• Gas Safety (Installation and Use) Regulations 1998 - landlords must ensure all gas appliances, pipework, and flues in a rented property are maintained in a safe condition. A Gas Safe registered engineer must carry out an annual gas safety check, and the resulting certificate (known as a CP12) must be renewed every 12 months. Gas Safe registration is legally required for any engineer working on gas boilers - it is a criminal offence to work on gas appliances without it.
• The Homes (Fitness for Human Habitation) Act 2018 - a property must remain fit for habitation throughout the tenancy. A boiler that won't fire during a cold Kent winter is not a minor inconvenience; in some cases it can render a property unfit and expose landlords to county court action.
• Housing Health and Safety Rating System (HHSRS) - persistent heating failures can be classified as a category 1 hazard, which local councils have powers to act on directly.

Our engineers regularly attend Bexleyheath properties where landlords have delayed boiler repairs without realising that the environmental health team at the London Borough of Bexley holds real enforcement powers - including the ability to issue improvement notices and, in serious cases, prohibition orders.

Landlords managing multiple rental properties across Bexleyheath and the broader Kent area should keep copies of all gas safety certificates, repair invoices, and engineer reports. These aren't just good practice - they're your legal protection if a dispute arises.

What Tenants Are Expected to Handle

Tenants aren't entirely passive in this. There's a set of basic checks that fall to the person living in the property before escalating to the landlord. Running through these first can save everyone time and unnecessary callout costs.

Basic checks tenants should carry out:

1. Check the thermostat - If the room thermostat is set below the current room temperature, the boiler won't activate. Check both the room thermostat and any programmer or timer settings. It's one of the most common causes of a boiler appearing to have stopped working.
2. Check boiler pressure - Most modern combi boilers need to operate between 1 and 1.5 bar. If the pressure gauge reads below 1 bar, this is a likely cause of lockout. Repressurising using the filling loop is something most tenants can do safely by following the manufacturer's guidance. Worcester Bosch, Vaillant, and Ideal all provide clear step-by-step instructions in their manuals and on their websites.
3. Check the gas supply - If you have a gas hob, try lighting it. If there's no gas at the hob either, the issue is with the supply rather than the boiler. Contact your gas supplier or call the National Gas Emergency Service on 0800 111 999.
4. Check for a frozen condensate pipe - In cold weather, this is one of the most common reasons a boiler stops firing. The condensate pipe typically runs to an outside drain and can freeze solid overnight. You can often thaw it by pouring warm water along the pipe and resetting the boiler - this fix costs nothing and can have you back up and running in minutes.
5. Reset the boiler - Most modern boilers go into lockout after detecting a fault. There's typically a reset button marked with a flame symbol. Press it once and wait. If the boiler locks out again immediately, stop - repeated resets can mask the underlying fault and make diagnosis harder for an engineer.
6. Check the electricity supply - Boilers run on electricity as well as gas. Check the consumer unit for a tripped fuse and confirm the isolation switch near the boiler is in the on position.

What tenants must not do is touch any internal gas components, attempt to relight a pilot light on older systems, or carry out anything that would require Gas Safe registration. Those repairs sit entirely with the landlord's appointed engineer.

Grey Areas - Where Disputes Happen

Most landlord-tenant disputes over boiler failures don't arise from the repair itself - they come from questions about who caused the fault or delayed the fix. Here are the situations our engineers see disputed most often.

Tenant neglect leading to the failure

If a tenant has repeatedly let the boiler pressure drop without repressurising it, or has turned the heating off completely in winter and caused pipes to freeze and split, a landlord may argue the tenant contributed to the damage. Proving this is difficult, and tenants are rarely asked to cover the full cost of repair - but it can complicate deposit returns and create friction.

Bleeding radiators

Tenants are commonly expected to bleed their own radiators - it's a basic maintenance task. However, if air keeps entering the system and the boiler is repeatedly losing pressure and locking out as a result, that's pointing to a wider fault. A faulty pressure relief valve or a hidden leak in the pipework would explain it, and both of those are firmly the landlord's repairs to make.

Delayed reporting

If a tenant notices a boiler fault and waits several weeks before reporting it, during which time the fault worsens, a landlord can reasonably argue the delay increased repair costs. Tenants should report in writing as soon as they notice a problem - not when it becomes urgent.

Repair versus replacement

Tenants sometimes push for a full boiler replacement rather than another repair on an ageing unit. Landlords are generally entitled to repair rather than replace, unless the boiler is beyond economic repair. If significant repairs are needed more than twice in a 12-month period, there's a reasonable argument for replacement - but it's not automatic, and it needs to be supported by documented evidence.

How to Report This Issue - a Tenant's Guide

If the basic checks above haven't resolved the problem, follow these steps to report the fault properly and protect yourself throughout the process.

1. Report in writing immediately - Email is better than a phone call because it creates a clear, timestamped paper trail. State the date, the exact problem (no heating, no hot water, error code showing on the display), and any checks you've already carried out. Keep a copy.
2. Give a clear deadline - For a complete heating failure in cold weather, state in your message that you expect a response within 24 hours. In summer, 48 to 72 hours is more typically reasonable. Be specific rather than vague.
3. Use the Voltrade GoFIX diagnostic tool - Before the engineer arrives, GoFIX can help you identify the likely fault based on your boiler's symptoms and error codes. This means you can describe the problem clearly to your landlord or letting agent, rather than just reporting that "the boiler isn't working." It also helps when getting quotes, because you'll have a clearer sense of what type of repair to expect.
4. Escalate if there's no response - If the landlord or letting agent doesn't respond within a reasonable time, contact the environmental health team at the London Borough of Bexley. They have powers to require landlords to carry out repairs and can act quickly in urgent cases.
5. Do not withhold rent - Withholding rent over an outstanding repair can put you in breach of your tenancy agreement. Get advice from Citizens Advice or a housing solicitor before taking this step - there's a specific legal process to follow, and skipping it can backfire.

Getting It Fixed Quickly in Bexleyheath Rental Properties

Understanding what's likely gone wrong helps landlords make faster decisions and gives tenants better conversations with their managing agents. Our engineers working across Bexleyheath and Kent find that boilers refusing to fire almost always come down to one of a handful of fault types. UK boiler repair guides reflect the same picture we see on the ground.

Common causes and typical repair costs in 2026:

• Ignition electrode or igniter failure - the boiler tries to fire but the spark isn't reaching the burner. Typically costs between 100 and 200 pounds including parts and labour.
• Faulty gas valve - the valve controlling gas flow to the burner has failed. One of the more expensive repairs, typically between 200 and 400 pounds. On older Worcester Bosch or Vaillant models, the cost can approach the price of a basic new boiler installation.
• Printed circuit board (PCB) failure - the control board has developed a fault. Repair costs typically range from 200 to 500 pounds depending on the make. Baxi and Ideal boards tend to be more readily available and cheaper to source than some Continental-manufactured alternatives.
• Frozen or blocked condensate pipe - a very common winter cause of boiler lockout. Often fixable by the tenant at no cost. An engineer callout to diagnose and resolve it is typically between 60 and 100 pounds.
• Low system pressure causing lockout - quick to fix once diagnosed. A callout purely for repressurising typically costs 60 to 120 pounds, though it shouldn't need one if the tenant follows the boiler manual.
• Thermostat or programmer fault - the boiler may be perfectly functional but receiving no signal to fire. Replacement thermostats typically run from 50 to 250 pounds fitted, depending on the model and whether a smart thermostat is being installed at the same time.

Any engineer attending a gas boiler fault must be Gas Safe registered - you can verify this on the Gas Safe Register website using the engineer's licence number before they set foot in the property. This applies to diagnosis as well as repair; an unregistered person should not be opening up a boiler under any circumstances.

For landlords with multiple properties in Bexleyheath, a standing service contract with a local Gas Safe engineer and an annual boiler service scheduled each autumn can significantly cut response times and reduce the likelihood of mid-winter emergency callouts.

Documentation You Should Keep

Whether you're the landlord or the tenant, good records are what protect you when a dispute arises. Don't assume the other party is keeping paperwork on your behalf.

Landlords should retain:

• Current gas safety certificate (CP12) - renewed every 12 months, legally required
• Full boiler service history
• All repair invoices and engineer's written reports, including fault descriptions
• Boiler warranty documentation - typically 5 to 10 years on modern boilers
• All written correspondence with tenants about reported faults and the response taken

Tenants should retain:

• All written messages reporting the fault, with exact dates and times
• Photographs or video of the boiler display showing any error codes
• Notes on basic checks carried out before reporting
• Any correspondence with the council or environmental health team
• A log of how long the property was without functioning heating or hot water

If a dispute reaches a deposit scheme adjudicator, housing tribunal, or county court, this documentation shapes the outcome. In our experience working across Kent rental properties, the party with the better paper trail almost always comes out ahead.

Landlord and Tenant Questions

Is a landlord legally required to fix a boiler within a set timeframe?

There's no single statutory deadline written into law, but landlords must act within a "reasonable time." For a complete heating failure in cold weather, most councils and housing solicitors treat 24 hours as the benchmark. During warmer months, 48 to 72 hours is more typically accepted. Continued delays can prompt the tenant to report to the London Borough of Bexley's environmental health team or apply to the First-tier Tribunal (Property Chamber) for a formal repair order.

Can a tenant arrange their own boiler repair and deduct the cost from rent?

"Repair and deduct" is a legal route available to tenants in some circumstances, but it's complex and carries real risk if the process isn't followed correctly. You need to show you gave the landlord adequate written notice and a reasonable opportunity to carry out the repair. Skipping steps can leave you in breach of your tenancy agreement, even if the repair itself was justified. Get advice from Citizens Advice or a housing solicitor before taking this route.

Who pays for the annual gas safety check in a rented property?

The landlord pays for the annual gas safety check - it's a legal obligation placed on them by the Gas Safety (Installation and Use) Regulations 1998, and it must be carried out by a Gas Safe registered engineer every 12 months. Tenants should receive a copy of the gas safety certificate within 28 days of it being issued. Gas Safe registration is legally required for any engineer carrying out this work - there are no exceptions, and no equivalent qualification substitutes for it.

What if a boiler keeps breaking down and the landlord keeps repairing it?

A landlord is entitled to repair rather than replace a boiler, provided the repairs actually resolve the fault. If the same boiler is failing repeatedly - particularly if there have been multiple significant breakdowns within 12 months - tenants can make a case to the council or a tribunal that the property is no longer fit for habitation and that replacement is warranted. Detailed records of each fault, each repair visit, and every period without heating are essential for building that argument.

Does a Bexleyheath tenant have any rights if the landlord refuses to fix the boiler?

Yes. Under the Homes (Fitness for Human Habitation) Act 2018, a property without working heating in winter can be considered unfit for habitation, and tenants can apply to the county court for a repair order. The London Borough of Bexley's environmental health team can also issue improvement notices requiring landlords to act and, in serious cases, carry out the repairs themselves and recharge the landlord for the cost. Document every stage of the dispute carefully before escalating.