How to Detect and Fix Common Underfloor Heating Problems
Underfloor heating is reliable and low-maintenance—but no system is immune to occasional issues. Cold patches, system failures, or skyrocketing energy bills? You could be dealing with a simple fix—or something more serious.
Here’s how to diagnose and resolve the most common underfloor heating problems.
Problem #1 – Uneven or Cold Spots
Possible Causes:
- Airlocks in pipe loops
- Blocked flow meters
- Thermostat not reading accurately
Fix:
- Bleed the affected loop
- Check flow settings on the manifold
- Reset or replace the thermostat
Problem #2 – No Heat at All
Possible Causes:
- System off at boiler/fuse
- Faulty wiring or thermostat
- Pump failure (wet systems)
Fix:
- Check the power supply
- Test connections at manifold
- Call a qualified engineer if pump isn’t engaging
Problem #3 – Unusual Noises
Possible Causes:
- Air trapped in the pipes
- Loose fittings
- Sludge buildup (older systems)
Fix:
- Bleed the system
- Schedule a flush and clean every 5–7 years
FAQs
Q: Why is one room not heating but others are fine?
A: The valve or actuator for that zone may be stuck or faulty.
Q: Do underfloor heating systems need servicing?
A: Yes—water systems should be checked every 1–2 years.
System not performing like it used to?
Our expert engineers at Interior Screed Ltd can diagnose and repair any underfloor heating issue—fast.
