Fix & Repair Engineers provides a complete underfloor heating service for wet and electric UFH systems, covering repairs, fault diagnosis, servicing, maintenance and new installation across London and the Home Counties.
Our engineers work on the full system rather than treating underfloor heating as a single hidden component. That includes manifolds, pumps, actuators, valves, pipe circuits, thermostats, wiring centres, sensors, electric heating mats and cables, together with the boiler or heat-pump interface where relevant.
- Wet and electric underfloor heating repairs
- UFH servicing, maintenance and system checks
- New installations, replacements, extensions and upgrades
- Fault finding for cold zones, uneven heat, controls and pressure loss
- Underfloor heating leak detection and targeted repair support
Complete Underfloor Heating Services
Underfloor heating problems often cross more than one trade. A cold room may be caused by a thermostat, actuator, manifold, circulation problem, wiring fault, damaged electric element or an issue with the heat source. Our service is structured around the system as a whole so the fault can be identified before parts are replaced unnecessarily.
UFH Repairs & Fault Diagnosis
Diagnosis and repair for cold zones, manifold faults, pumps, actuators, thermostats, sensors, wiring and damaged electric heating elements.
Servicing & Maintenance
Performance checks for wet UFH components, controls, flow, pressure and zoning, plus electrical checks where electric UFH problems are suspected.
New UFH Installation
Wet and electric underfloor heating installation for refurbishments, extensions, new projects and planned heating upgrades.
Leak Detection & Targeted Repair
Professional investigation of pressure loss, suspected concealed pipe leaks and wet UFH faults before disruptive floor access is considered.
Underfloor Heating Repairs & Specialist Fault Diagnosis
When underfloor heating stops working, the visible symptom does not always identify the failed component. A room that stays cold could have a control problem, a failed actuator, poor water flow, trapped air, a circulation issue or a fault in a concealed electric heating element. Effective underfloor heating repair starts with diagnosis, not guesswork.
We work on both water-based and electric systems and select the diagnostic approach according to the system type. Thermal imaging can help identify temperature patterns, but it is used alongside the appropriate hydraulic or electrical tests rather than as a substitute for them.
Wet UFH Faults We Investigate
- One or more zones not heating
- Manifold, flow meter and valve problems
- Failed or sticking actuators
- Circulation pump faults
- Airlocks and poor circulation
- Incorrect flow or system imbalance
- Pressure loss and suspected leaks
- Thermostat, wiring centre and control faults
- Boiler or heat-pump demand/interface issues
Electric UFH Faults We Investigate
- Heating mat or cable not warming
- Only part of the floor heating
- Thermostat or relay failure
- Floor sensor faults
- Wiring and connection problems
- RCD or protective device tripping
- Damaged heating cable or mat
- Incorrect control settings or sensor configuration
Underfloor Heating Servicing & Maintenance
Underfloor heating servicing is not identical for every system. Wet UFH contains mechanical and hydraulic components that can be checked for correct operation, while electric UFH has fewer moving parts and is generally assessed through its controls, sensors and electrical performance when a problem is reported.
For wet systems, a professional UFH service or maintenance visit can help identify developing issues such as poor circulation, sticking actuators, weak pump performance, incorrect flow rates or unstable system pressure before they result in complete loss of heat.
Flow & Zoning
Check that circuits and zones are responding correctly and that water is circulating as intended through the manifold.
Manifold, Pump & Actuators
Assess accessible manifold components, circulation pump operation, valves and actuators for signs of malfunction or poor response.
Controls & Thermostats
Check room thermostats, wiring centres, sensors and system demand where controls are not bringing zones on correctly.
Pressure & System Condition
Review system pressure behaviour, visible leakage, accessible components and system-water condition where relevant to the installation.
Underfloor Heating Installation, Replacement & Upgrades
A successful UFH installation depends on more than laying pipe or heating mat. The system needs to be suitable for the property heat loss, floor construction, floor covering, room use, available electrical supply or heat source, zoning requirements and the way the building will actually be occupied.
We install both wet and electric underfloor heating and can support new systems, extensions to existing heating arrangements, replacement controls and planned upgrades. Wet UFH can work particularly well with lower-temperature heat sources such as heat pumps when the system is correctly designed, while electric UFH can be practical for individual rooms and certain retrofit applications.
Wet Underfloor Heating Installation
- Pipe circuit layout and zoning
- Manifolds, flow control and actuators
- Pumps, valves and hydraulic components
- Thermostats and wiring centres
- Boiler or heat-pump integration
- Pressure testing, balancing and commissioning
Electric Underfloor Heating Installation
- Electric heating mats
- Loose-wire heating systems
- Suitable foil heating systems
- Floor sensors and thermostats
- Electrical supply and control requirements
- Testing before, during and after installation
What We Consider Before Installation
- Room-by-room heat loss and required heat output
- Floor build-up, insulation and available floor height
- Final floor covering and manufacturer temperature limits
- Existing boiler, heat pump or electrical capacity
- Zoning, thermostats and control strategy
- Access to manifolds, controls and serviceable components
- Testing, commissioning and handover requirements
Wet & Electric Underfloor Heating Systems We Work On
The two main UFH technologies produce heat in different ways and require different diagnostic skills. Our team works across both, allowing us to assess the heating, plumbing and electrical elements involved rather than limiting the visit to one component.
Wet / Hydronic Underfloor Heating
Warm water circulates through floor pipe circuits connected through a manifold. We work on manifolds, pumps, actuators, valves, controls, pipe circuits and heat-source integration.
Electric Underfloor Heating
Heating cable or mat is installed beneath or within the floor build-up. We diagnose and repair controls, sensors, wiring, cable and mat faults where access and repair are technically appropriate.
UFH with Heat Pumps
We support wet systems connected to air-source or ground-source heat pumps, including flow, zoning and control issues affecting UFH performance.
UFH with Boilers
Where UFH is connected to a gas boiler, appropriately qualified Gas Safe registered engineers deal with work that involves the gas appliance or gas installation.
Common Underfloor Heating Problems We Resolve
The pattern of the fault often helps narrow down where to test first. These are some of the most common reasons customers arrange an underfloor heating engineer.
Underfloor Heating Not Working
The whole system is cold or fails to respond when heat is requested.
One Room or Zone Is Cold
A single zone stays cold while other rooms heat normally, often pointing diagnosis towards local controls, actuators or flow.
Uneven Heat or Cold Patches
Part of the floor warms but heat distribution is inconsistent across the room or circuit.
Manifold, Pump or Actuator Faults
Accessible wet-system components fail to move, circulate or control water correctly.
Thermostat, Sensor or Wiring Faults
Controls show incorrect temperatures, fail to call for heat or stop communicating with the heating system.
Electric UFH Trips the RCD
Protective devices trip when the floor heating is energised, requiring electrical fault testing before further use.
Pressure Loss or Suspected Leak
Wet UFH loses pressure, dampness appears or the system requires repeated topping up.
Slow or Poor Heat Output
The floor takes unusually long to respond or rooms no longer reach the expected temperature.
How We Diagnose and Repair Underfloor Heating
Because much of a UFH system is concealed, a structured diagnostic process helps avoid unnecessary floor removal and unnecessary component replacement.
Understand the System and Symptoms
We establish whether the system is wet or electric, the heat source, which zones are affected, when the problem started and any recent building or heating work.
Test the Relevant Components
Depending on the system, this may involve controls, electrical tests, manifold checks, pump operation, actuators, flow, pressure behaviour and heat-source demand.
Locate the Fault
Thermal imaging and other diagnostic methods may be used where they add useful evidence, particularly for concealed heating patterns or suspected leak locations.
Explain the Repair Options
Once the cause is identified, we explain the recommended repair, any access required and the associated quotation before follow-on work proceeds.
Repair, Test and Confirm Operation
After repair, the relevant zones, controls and system operation are tested so the work is not treated as complete until performance has been checked.
Domestic & Commercial Underfloor Heating Services
Our UFH work covers individual homes as well as larger and more complex properties where heating reliability, zoning and access need to be managed carefully.
Homes, Landlords & Residential Property
- Houses, flats and apartments
- Extensions and refurbishments
- Bathrooms, kitchens and individual electric zones
- Whole-house wet UFH systems
- Rental properties and managed residential portfolios
- Boiler and heat-pump connected systems
Commercial & Managed Buildings
- Offices and workplaces
- Retail and hospitality premises
- Schools and educational buildings
- Healthcare and care environments
- Large residential and mixed-use properties
- Facilities and planned maintenance support
For commercial sites, we can coordinate diagnosis, planned servicing and installation work around access requirements and the wider heating system so facilities teams have a clear scope before work proceeds.
UFH Safety, Electrical Work and Heating Compliance
Underfloor heating can involve electrical circuits, central-heating water, boilers, heat pumps and concealed building fabric. The qualifications and standards relevant to the work therefore depend on the system and the part being worked on.
Gas Safe Where Required
Work involving a gas boiler or gas installation is carried out by appropriately qualified Gas Safe registered engineers.
Qualified Electrical Work
Electric UFH supplies, controls and repairs are assessed and completed by appropriately qualified personnel in line with applicable electrical requirements.
Building Regulations
New installations are planned with applicable Building Regulations, controls, heat-loss and energy-efficiency requirements in mind.
Testing & Commissioning
Wet and electric systems are tested using methods appropriate to the installation, with controls and operation checked before handover.
Underfloor Heating Services Across London & the Home Counties
We provide wet and electric underfloor heating repairs, servicing, fault diagnosis and installation across London and the Home Counties. Choose your area below for local service information and coverage.
Underfloor Heating Guides & Specialist Support
These supporting resources cover the main informational questions around UFH while this hub remains focused on professional repairs, servicing and installation.
Underfloor Heating Not Working
Understand common symptoms such as cold zones, poor circulation, control faults and total system failure.
How to Bleed Underfloor Heating
Learn why air can affect a wet UFH circuit and when professional help is more appropriate than further system adjustment.
Broken Underfloor Heating Mat
Fault diagnosis and repair options for damaged electric heating mats, cables, sensors and related controls.
Underfloor Heating Cost Guide
What determines the cost of UFH installation, diagnosis, repair and system upgrades without relying on misleading one-size-fits-all figures.
UFH Leak Detection & Repair
Specialist investigation for pressure loss, damp areas and suspected concealed leaks in wet underfloor heating systems.
Book an Underfloor Heating Engineer
Send your postcode, system type and symptoms to arrange diagnosis, servicing or a quotation for installation work.
Why Choose Fix & Repair Engineers for Underfloor Heating?
Underfloor heating can involve heating hydraulics, plumbing, electrical controls and concealed components beneath the finished floor. Our engineers can assess the system as a whole, helping avoid unnecessary work and directing the repair to the component or circuit actually causing the problem.
UFH Experience
Established experience across underfloor heating installation, repair, servicing and maintenance.
Complete System Coverage
Support for hydronic UFH as well as electric mats, cables, thermostats, sensors and controls.
Qualified Trades
Gas Safe registered and electrical expertise applied where the system and scope of work require it.
Approved Contractor
Approved-contractor capability for Warmup underfloor heating systems and associated components.
Accredited Business
Professional health and safety standards supporting domestic, landlord and commercial work.
Fault Diagnosis
Thermal imaging and system-specific testing help narrow down concealed or intermittent UFH faults.