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Verified boiler fault-code guides
Choose a supported model and code to read the catalogue entry and its source documents.
Ideal · Logic Code Combi ESP1
- Ideal F1The manufacturer describes F1 as low water pressure.
- Ideal F2The manufacturer describes F2 as flame loss.
- Ideal F3The manufacturer describes F3 as fan fault.
- Ideal F6The manufacturer describes F6 as outside sensor failure.
- Ideal L1The manufacturer describes L1 as flow temperature overheat or no water flow.
- Ideal L2The manufacturer describes L2 as ignition lockout.
- Ideal L6The manufacturer describes L6 as false flame lockout.
- Ideal LCLC indicates 5 boiler resets in 15 minutes.
- Ideal F4F4 indicates a flow thermistor fault.
- Ideal F5F5 indicates a return thermistor fault.
- Ideal F7F7 indicates low mains voltage.
- Ideal F9F9 indicates an unconfigured or faulty PCB.
- Ideal FAFA indicates a negative differential between the flow and return thermistors.
- Ideal FUFU indicates the flow/return temperature difference is greater than 50C.
- Ideal dUdU indicates the diverter valve is in mid-position for service.
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