Underfloor heating not working? Find out all causes, how to DIY and when to call a professional to handle it.

Testing undefloor heating is essential for safety, efficiency, and long-term performance. In this guide, we explain why testing matters, the risks of faulty systems, how professionals diagnose problems, and why calling an experienced heating engineer is always the safest option.

Underfloor heating beneath tiled floors should provide even, comfortable warmth, but when something goes wrong the problems are rarely obvious. Cold spots, cracked tiles, overheating floors, or a system that stops working altogether are all signs of underlying faults hidden beneath the surface. Because underfloor heating is buried below tiles and screed, these issues can be difficult and sometimes dangerous to investigate without professional expertise.

If your underfloor heating thermostat is not working, your home can quickly become uncomfortable and the issue may be more serious than it looks. From electrical faults to sensor failures, discover the main causes, safe fixes and why calling a professional engineer is the best way to protect your heating system.