If you’re getting hot water but no heating, it’s often a sign of a boiler or central heating system fault that requires prompt inspection. For landlords, leaseholders, and property managers, this issue can disrupt tenant comfort, breach legal obligations, and affect property compliance in the competitive London housing market.
Fraser Bond works with certified Gas Safe heating engineers across Greater London to resolve heating issues quickly and safely—helping to prevent further damage, maintain legal compliance, and restore functionality in both private and rented properties.
What Causes Hot Water But No Heating?
This issue is common in combi boilers and system boilers where hot water remains functional, but radiators stay cold. The root cause can range from minor control faults to component failures. Key causes include:
1. Faulty Diverter Valve
This component controls whether the boiler sends heat to taps or radiators. If stuck or broken, it may prioritise hot water only.
2. Thermostat or Programmer Malfunction
Incorrect settings or a failed wall thermostat can prevent the heating circuit from activating, even if hot water functions.
3. Low Boiler Pressure
If the pressure drops below safe operating levels, central heating may shut off to protect the system.
4. Airlocks or Blockages
Air trapped in the radiators or sludge build-up in pipes can block heat flow.
5. Pump or Motorised Valve Failure
Even if the boiler heats water, a failed pump may prevent circulation to radiators.
Fraser Bond’s heating engineers conduct thorough diagnostics to isolate the issue and recommend the safest, most cost-effective solution.
Who Needs to Act – Legal Responsibilities for Landlords and Leaseholders
In rented properties, heating and hot water are legal repair obligations under the Landlord and Tenant Act 1985 and Housing Health and Safety Rating System (HHSRS).
Fraser Bond supports:
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Landlords – Repairing heating quickly to avoid legal penalties or rent withholding
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Letting agents – Coordinating between engineers and tenants
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Leaseholders – Resolving heating issues tied to private boilers in flats
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Block managers – Diagnosing shared heating system faults
We provide full service reports, CP12 checks (if gas-related), and guidance on repair options or replacements.
What to Do Next – Fraser Bond Heating Solutions
Fraser Bond offers same-day heating fault diagnosis and repairs in London, delivered by Gas Safe engineers. Services include:
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Heating and boiler diagnostics
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Diverter valve and thermostat replacements
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Radiator bleeding and powerflushing
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System re-pressurisation
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Documentation for landlords or leaseholders
If a replacement boiler is needed, we also offer compliant boiler installations with all necessary Building Regulation certificates and safety sign-offs.
Conclusion – Resolve Heating Issues Quickly with Fraser Bond
If you have hot water but no heating, it’s likely a fault in your central heating controls, valves, or circulation system. Fraser Bond offers a rapid, fully certified service for diagnosing and repairing these issues—supporting compliance, property value, and tenant comfort.
Visit FraserBond.com to book a heating inspection or include boiler diagnostics in your maintenance service plan.
