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Verified boiler fault-code guides
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Ideal · Independent+ Combi 24/30/35
- Ideal F1Low water pressure.
- Ideal F2Flame loss.
- Ideal F3Fan fault.
- Ideal F4Flow thermistor.
- Ideal L4Flow thermistor.
- Ideal F5Return thermistor.
- Ideal L5Return thermistor.
- Ideal F6Outside sensor failure.
- Ideal F7Low mains voltage.
- Ideal F9Unconfigured PCB.
- Ideal L9Unconfigured PCB.
- Ideal L1Flow temperature overheat or no water flow.
- Ideal L2Ignition lockout.
- Ideal LC5 boiler resets in 15 minutes.
- Ideal FANegative differential flow/return thermistor.
- Ideal FUFlow/return differential > 50°C.
- Ideal dUDiverter valve in mid-position for service.
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