- Switch the hood off and allow it to cool if it was recently in use.
- Replace or reactivate the charcoal filter if your hood supports it.
- Reinstall the filter correctly and reset the filter reminder using the hood controls or the user manual instructions.
C is a maintenance indicator for the charcoal filter. It usually means the filter has reached its service interval and needs cleaning, replacement, or reactivation before the reminder is reset.
- The hood shows C on the display even though extraction still works.
- Airflow may feel reduced if the filter is heavily loaded with grease or odours.
- The reminder returns if the filter was not serviced or the reset was incomplete.
- Charcoal filter has reached its maintenance interval.
- The filter was serviced but the indicator was not reset.
- The filter was reinstalled incorrectly or remains too dirty to restore normal airflow.
- Remove the filter again and check that it is the correct type for the hood.
- Confirm the filter is seated properly and any catches or tabs are engaged.
- Repeat the reset sequence exactly as described for your model in the user manual.
| Checkpoint | What to confirm | Good result | If it fails |
|---|---|---|---|
| Filter condition | charcoal filter has been cleaned or replaced | Reminder can be reset | Service the filter again or replace it |
| Fitment | Filter sits correctly in the hood | Normal airflow resumes | Reinstall the filter carefully |
| Reset | Indicator reset sequence completed | Code clears | Use the manual for the exact reset steps |
- Trying to clear the code before the filter has actually been serviced.
- Reinstalling the filter while it is still wet or not fitted correctly.
- Assuming the code means an electrical failure when it is only a maintenance reminder.
- Do not run the hood with the filter removed unless the manual explicitly allows it for testing.
- Do not ignore the reminder for long periods, especially on grease filters.
- Let the hood cool before removing filters after cooking.
- Grease filters can become a fire risk if they are left saturated for too long.
Contact support if C stays on after correct filter maintenance and reset, or if the hood controls do not respond normally.
- Clean or replace filters on schedule instead of waiting for heavy buildup.
- Use the correct fan speed so grease and moisture are extracted efficiently.
- Reset the reminder only after the filter service is complete.
Is C a fault or just maintenance?
It is usually a maintenance reminder for the charcoal filter, not a major electrical failure.
Why did the code come back straight after I cleaned the filter?
The reminder may not have been reset correctly, or the filter may still be fitted incorrectly or remain too dirty.