HIU Troubleshooting Guide
Common problems and quick fixes for Heat Interface Units. Try these steps before requesting an engineer visit.
Emergency Situations
For gas leaks, major water leaks, burning smells, or complete loss of heating/hot water in winter, don't wait - call us immediately on 07391 418 640.
No Heating or Hot Water
Pressure Issues
Unusual Noises
Error Codes & Display Issues
General Maintenance
Emergency Situations
Still Need Help?
If you've tried the troubleshooting steps above and the issue persists, or if you're unsure about any procedures, our engineers are ready to assist.