| Codes | Description |
|---|---|
| F00 | Flow heating temperature sensor fault |
| F01 | Return heating temperature sensor fault |
| F10 | Flow heating temperature sensor fault |
| F11 | Return heating temperature sensor fault |
| F20 | Overheating fault |
| F22 | Low water pressure |
| F23 | Water circulation fault |
| F24 | Water circulation fault |
| F26 | Fault in gas valve |
| F27 | Flame detection fault |
| F28 | Ignition fault |
| F29 | Loss of flame during operation |
| F32 | Incorrect air pressure |
| F49 | EBUS voltage fault |
| F61 | Fault in the main board |
| F62 | Fault in the main board |
| F63 | Fault in the main board |
| F64 | Fault in the main board |
| F65 | Fault in the main board |
| F67 | Fault in the main board |
| F68 | Fluctuation of flame signal |
| F70 | User interface incompatible with the main board |
| F71 | Flow heating temperature sensor fault |
| F72 | Permanent temperature difference between flow and return heating sensors |
| F73 | Heating circuit pressure sensor fault |
| F74 | Heating circuit pressure sensor fault |
| F76 | Thermal fuse fault |
| F77 | Fault in gas valve motor |
| F83 | No water in the installation |
| F84 | Permanent temperature difference between flow and return heating sensors |
| F85 | Flow and Return heating sensor fault |
| F86 | Underfloor heating contact fault |
| Err | User interface fault |
Glow-Worm Ultracom2 CXI Boiler Range Error Codes
Glow-Worm Ultracom2 CXI Boiler Range Error Codes