JennAir Hood Display C: Time to clean the charcoal filters

What C means

On JennAir vent hoods with a display, including wall and island canopy hoods, a C that shows while the fan is running is a reminder, not an error. After 120 hours of fan operation the display shows C to tell you the charcoal filters need washing. To reset the charcoal filter saturation alarm, press and hold FAN for three seconds. Once reset, C is no longer displayed. The charcoal filter can be cleaned and reactivated.

Common causes of C

120 hours of fan operation have passed
Charcoal filters saturated with grease and odors
Reminder not reset after the last cleaning

✓ One safe check you can try

1. Turn the fan off and let the hood cool. 2. Remove the charcoal filters. 3. Clean and reactivate them as directed for your filter. 4. Reinstall them. 5. Press and hold FAN for three seconds so C goes out. If C returns immediately, call us.

! Why to stop there

The reminder is routine maintenance.
A C that returns right after cleaning suggests the timer or control needs a look.
When a visit is needed, the price is in writing before we start.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Ventilation Hood codes

FJennAir Hood Display F: Grease filters need washing

CC questions

Does C mean my hood is broken?

No. It means the fan has run 120 hours with the display active, and the charcoal filters are due for washing. The hood itself is working as designed.

How do I clear C?

Clean the filters, then press and hold FAN for three seconds so the saturation alarm resets and C disappears. Washing the filters is what restores them.

Do I need a technician?

Only if C comes back right after a reset or the fan misbehaves. The reminder itself is routine maintenance and needs no repair, and a quick wash of the charcoal filters is usually enough.