Glow-worm error codes
Common Glow-worm combi boiler fault codes and what they mean.
- F.00 Flow temperature sensor fault
- F.01 Return temperature sensor fault
- F.10 Flow temperature sensor short circuit
- F.11 Return temperature sensor short circuit
- F.20 Safety switch-off — overheating temperature reached
- F.22 Safety switch-off — low water pressure
- F.23 Temperature difference between flow and return too great
- F.24 Temperature rising too fast
- F.25 Flue gas temperature too high
- F.27 Fault in flame detection
- F.28 Ignition unsuccessful when starting up
- F.29 Flame loss
- F.32 Fan speed outside tolerance
- F.61 Gas valve control fault
- F.62 Gas valve switch-off control fault
- F.63 EEPROM (memory) fault
- F.65 Electronics temperature too high
- F.70 Invalid product code (DSN)
- F.73 Water pressure sensor not connected or short-circuited
- F.75 Pressure sensor fault