Ideal error codes
Common Ideal combi boiler fault codes and what they mean.
- C0 Central heating signal problem
- F1 Low water pressure
- F2 Flame loss
- F3 Fan fault
- F4 Flow thermistor (temperature sensor) fault
- F5 Return thermistor (temperature sensor) fault
- F6 Outside temperature sensor fault
- F7 Mains voltage too low
- F9 Control board (PCB) not configured
- FD No water flow — air lock, low water or circulation problem
- L1 Low water flow, or flow temperature out of range
- L2 Ignition lockout
- L4 Flow thermistor (temperature sensor) fault
- L6 False flame detected
- L9 Overheating — temperature reading too high