Underfloor Heating Repair Services in Lambeth & South London

Experienced and reliable local engineers for underfloor heating repair, fault finding and system diagnostics in Lambeth and South London.
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Sean Apap Mangion profile picture
Sean Apap Mangion
22 February 2026
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Have used them twice now, once to disconnect/relocate radiators and another time to relocate the boiler. In both cases the team managing things have been very professional, quick but thorough, and clear re what was to be done. Particular thanks to James, Ronan, and Nick. Prices are fair for good quality work and service, will definitely reach out again for any other jobs.
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Nicholas Wells Antiques
19 February 2026
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Very happy with Aren Heating & Plumbing servicing our wet underfloor heating. Excellent
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Adam Williams profile picture
Adam Williams
13 February 2026
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The team at Aren are consistently professional, responsive, polite and well priced.
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Daniel Otto Kellett
5 February 2026
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An excellent UFH service, good value, quick appointment and gave me some really useful advice. I’ll definitely be using them again. Thanks !!
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Nikolas Holttum profile picture
Nikolas Holttum
28 January 2026
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Aren were terrific. They really knew their stuff. They carried out a thorough diagnosis of our boiler problems and eventually recommended a replacement. All the team were punctual and super professional. Highly recommended.
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Courntey bailey
23 January 2026
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We have been using Aren Properly Services since 2022, and always receive amazing care when doing our boiler services, or any remedial works. They always go above and beyond and never try to rip you off like a lot of contractors out there. Highly recommend
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Timur Sanerkin profile picture
Timur Sanerkin
21 January 2026
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First class service
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Emily C profile picture
Emily C
21 January 2026
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Quick and professional service. Fixed my heating and clearly explained the problem and fix.
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Thomas Goode profile picture
Thomas Goode
13 January 2026
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I had an issue with my HIU. I was able to quickly arrange a booking with Aren. Their onsite engineer was polite, friendly and punctual. He fixed the problem quickly and gave me some basic advice on what to look out for to help troubleshoot future problems. I would highly recommend Aren Heating and Plumbing.
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Duncan K profile picture
Duncan K
12 January 2026
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Quick, clean and efficient. Very pleased and will be using Aren again. Ronan (the plumber) worked hard and fast to finish job inside 1 hour which kept the cost down for me, when he could have easily relaxed and stretched it out. Thanks!

Get it fixed:

Underfloor Heating Repair

Underfloor heating repair involves finding and fixing faults that stop your system from working properly. Whether you have no heat, uneven heating, a leaking pipe, a faulty thermostat or a problem with the pump or controls, our experienced engineers can diagnose the issue and carry out the necessary repair.

We work on a wide range of underfloor heating systems across Lambeth and South London, including wet underfloor heating, electric underfloor heating and associated controls and components. Our aim is to identify the cause of the fault quickly, explain the problem clearly and recommend the most practical repair.

Our professional and qualified engineers have experience repairing many different underfloor heating systems and manufacturers. If your system is not working as it should, we are on hand and ready to help.

In the heat of the moment, call or WhatsApp Aren Heating & Plumbing on 020 8287 7194, or head over to our contact page to submit a request via our online form.

Common Issues That Might Require Underfloor Heating Repair

No Heat Output

If your underfloor heating is not producing any heat, the problem could be caused by a faulty thermostat, damaged wiring, a failed actuator, a circulation issue or a fault elsewhere in the system.

Uneven Heating

If some parts of the floor feel warmer than others, or certain areas stay cold, this may point to airlocks, blockages, balancing issues, pump problems or faults within individual zones.

Leaks and Pressure Loss

Leaks within the pipework, manifold or connecting parts can lead to pressure loss and reduced performance. Water leaks can also cause damage to floors and surrounding areas, so early diagnosis is important.

Thermostat Problems

If the thermostat is not responding properly, showing incorrect temperatures or failing to control the system accurately, the issue may lie with the thermostat itself, the sensor or the wiring.

Electrical Issues

On electric underfloor heating systems, faulty connections, damaged wiring, failed sensors or control issues can prevent the system from heating correctly and require specialist fault finding.

Pump, Valve or Manifold Faults

Problems with the pump, mixing valve, manifold or actuators can affect circulation and heat distribution, leaving the system slow to respond or not working at all.

Noise

Unusual noises, such as banging or gurgling, can be a sign of trapped air, circulation issues or pressure-related faults within the system.

Sensor Malfunctions

Temperature sensors help regulate your system correctly. If a sensor fails or gives inaccurate readings, it can lead to poor temperature control and inefficient operation.

Repairing underfloor heating systems can be complex and requires a clear understanding of the components and the overall setup. Our specialised engineers will diagnose the issue, find the root of the problem and provide a clear repair plan and quote before work begins.

Key information

Underfloor heating fault finding
Underfloor heating controls and thermostats
Underfloor heating pumps, manifolds and components
Wet underfloor heating repairs
Electric underfloor heating repairs
Local engineers across Lambeth and South London

Repair Services We Offer

Diagnosis

The engineer will inspect the system to identify the root cause of the issue. This may involve checking the thermostat, sensors, wiring, pump, manifold, valves and overall system performance.

Repair Plan

Once the fault has been diagnosed, the engineer will set out the necessary steps to fix the problem. This could include replacing faulty parts, resolving circulation issues, fixing leaks or correcting electrical faults.

Component Replacement or Repair

Depending on the issue, the engineer may need to repair or replace faulty components such as pumps, valves, sensors, actuators or thermostats. In some cases, smaller parts can be repaired or replaced without changing the whole component.

Pressure Testing

If there has been a leak, the repaired section of the system will likely undergo pressure testing to ensure that it is no longer leaking and can hold the proper pressure.

System Testing

Once the repairs are completed, the entire system will be tested to ensure that it is functioning as intended. This includes checking for even heat distribution, proper temperature control, and accurate readings from the thermostat.

Preventive Measures

The engineer may provide recommendations for preventive maintenance to help prevent future issues. Regular maintenance, such as flushing the system to remove debris and air, and servicing annually, can help prolong the life of the underfloor heating system.

For information about the underfloor heating maintenance services we offer, check out our Underfloor Heating Service page.

In the heat of the moment – Call or WhatsApp Aren Heating & Plumbing on 020 8287 7194, or head over to our contact page to submit a request via our online form.

Gas & Landlord Safety Certificates

Estate agents and landlords regularly request our services for gas safety certificates and survey reports.

We provide a fast, professional and safe service so you can get your certificates and reports arranged with minimum fuss.

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Brands we work with

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Areas we cover

We cover these South London boroughs