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Ideal Boiler Fault Codes
Browse the available Ideal boiler fault codes in one place, then open the exact code page for the likely meaning, safe first steps, and when to stop troubleshooting.
Browse the parent brand page: Ideal
All fault codes in this cluster
18 code pages currently available for this brand and appliance cluster.
| Code | Meaning | Severity |
|---|---|---|
| C0 | A boiler sensor is giving an invalid reading | medium |
| C2 | A boiler sensor is giving an invalid reading | medium |
| C5 | Fan, flue, or air pressure sensing problem | high |
| C6 | Fan, flue, or air pressure sensing problem | high |
| C7 | Control board or internal communication fault | high |
| D4 | System water pressure is too low | medium |
| F1 | System water pressure is too low | medium |
| F2 | Flame detection has been lost during operation | high |
| F3 | Fan, flue, or air pressure sensing problem | high |
| F4 | The boiler has failed to ignite properly | high |
| F5 | A boiler sensor is giving an invalid reading | medium |
| F6 | A boiler sensor is giving an invalid reading | medium |
| F9 | Water circulation or pump performance issue | high |
| HF | The boiler has failed to ignite properly | high |
| L1 | The boiler has overheated or hit a high temperature limit | high |
| L2 | The boiler has failed to ignite properly | high |
| L5 | Control board or internal communication fault | high |
| L6 | Flame detection has been lost during operation | high |
Featured fault codes
C0 meaning and fix
A boiler sensor is giving an invalid reading
C2 meaning and fix
A boiler sensor is giving an invalid reading
C5 meaning and fix
Fan, flue, or air pressure sensing problem
C6 meaning and fix
Fan, flue, or air pressure sensing problem
C7 meaning and fix
Control board or internal communication fault
D4 meaning and fix
System water pressure is too low
F1 meaning and fix
System water pressure is too low
F2 meaning and fix
Flame detection has been lost during operation
F3 meaning and fix
Fan, flue, or air pressure sensing problem
F4 meaning and fix
The boiler has failed to ignite properly
F5 meaning and fix
A boiler sensor is giving an invalid reading
F6 meaning and fix
A boiler sensor is giving an invalid reading