Ideal Heating Fault Codes
Comprehensive reference table of all Ideal Heating boiler error codes. Click any code for detailed troubleshooting steps.
Pro Tip
Check your boiler's digital display panel (usually behind a drop-down cover) to find the current active fault code.
| Error Code | Description | Applies To |
|---|---|---|
| F1 | Low water pressure; switch has detected pressure below safe operating threshold. | Logic Max / Vogue |
| F2 | Flame loss during operation; temporary fault preceding lockout. | Logic Plus / Max |
| L2 | Ignition lockout; boiler has repeatedly failed to ignite and requires manual reset. | Logic Max / Vogue |
| L1 | Flow temperature overheat or no water flow lockout; critical heat dissipation failure. | Logic Plus / Max |
| F3 | Fan fault; lack of correct tachometer feedback from the fan motor. | Logic Series |
| F4 / L4 | Flow thermistor fault; sensor short-circuit or lead break. | Logic Series |
| F5 / L5 | Return thermistor fault; sensor short-circuit or lead break. | Logic Series |
| L6 | False flame lockout; flame detected before gas valve was commanded to open. | Logic Series |
| C0 / C2 | Boiler Chip Card (BCC) activation fault or calibration issue. | Vogue Gen 2 |
| F9 / L9 | Printed Circuit Board (PCB) fault or unconfigured PCB. | Logic Series |
| LC | Five boiler resets attempted within 15 minutes; system locked for safety. | Logic Plus / Max |
| F6 | Outside sensor failure; communication lost with weather compensation probe. | Logic Series |
| F7 | Low mains voltage; voltage supplied from the grid is below operational thresholds. | Logic Series |
| FU | Temperature differential between flow and return is greater than 50°C; check isolation valves. | Logic / Vogue |
| FA | Flow and return pipework has been installed in reverse. | Logic Regular |
| FD | No water flow detected within the system. | Logic Regular |
| 0 | System status: The boiler is in standby mode awaiting a heating or hot water demand. | Logic Series |
| C | System status: The boiler is operating normally in central heating mode. | Logic Series |
| D | System status: The boiler is operating normally in domestic hot water mode. | Logic Series |
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