What To Do If Underfloor Heating Stops Warming Up



Underfloor heating is a modern and efficient way to heat your home, but when it suddenly stops warming up, it can be frustrating. The good news is that most underfloor heating issues can be identified and resolved quickly when handled by an experienced heating engineer. Whether your system is electric or water-based, understanding a few simple checks can save time and help you know when to call in the experts.



Understanding Common Underfloor Heating Issues

When your underfloor heating isn’t producing heat, the problem could stem from a variety of sources, including air trapped in the system, electrical faults, or thermostat errors. Before panicking, it’s important to go through some simple steps to identify what’s going wrong.

Initial Checks Before Calling An Engineer

Check Your Thermostat Settings

The thermostat is often the first place to look. Ensure it’s switched on, set to the correct temperature, and not on a timer or holiday mode. If your thermostat display is blank or flickering, this could indicate a power issue or flat batteries (for wireless models).

Inspect Power and Circuit Connections

For electric underfloor heating systems, check your fuse box to ensure that no circuit breakers have tripped. In the case of water-based systems, make sure your boiler or heat pump is functioning and that power is reaching the pump or manifold.

Bleed the System to Remove Airlocks

Air trapped in the pipes can prevent water from circulating effectively in hydronic (water-based) systems. If parts of your floor feel warm while others remain cold, this could be the culprit. Bleeding the system removes trapped air and restores consistent heating.

Look for Flow or Pressure Problems

If your underfloor heating is connected to your central heating system, low water pressure could affect its performance. Check your boiler pressure gauge, it should typically sit between 1 and 2 bar. If it’s too low, you may need to top up the pressure or call an engineer to investigate any leaks.

Thermostatic or Sensor Faults

Temperature sensors or thermostatic valves can fail over time. Faulty sensors might send incorrect readings to your thermostat, preventing the system from heating up. A qualified engineer can test and replace these components safely.

Preventing Future Underfloor Heating Issues

To keep your underfloor heating running efficiently, it’s important to maintain it regularly. Dust and debris can affect electrical connections, while sludge or limescale buildup can reduce performance in water-based systems. Scheduling an annual service with a professional heating engineer in West Sussex or Hampshire ensures your system remains reliable and energy-efficient.

Routine Maintenance Includes:

• Checking thermostats and sensors for accuracy
• Inspecting pumps and valves for correct operation
• Flushing or descaling pipework if necessary
  
• Ensuring insulation and floor coverings allow even heat distribution
  

These proactive steps not only prevent unexpected breakdowns but also extend the lifespan of your system.