JennAir Hood Display F: Grease filters need washing

What F means

On JennAir vent hoods with a display, such as wall and island canopy styles, an F shown while the fan runs is a cleaning reminder. After 30 hours of fan operation the display shows F, which means the installed grease filters should be washed. The filters are metal and can go in the dishwasher or a hot detergent solution. Let the filter dry thoroughly before replacing it. Once cleaned, the reminder can be cleared from the hood control.

Common causes of F

30 hours of fan operation have passed
Grease built up on the metal filters
Reminder not cleared after the last wash

✓ One safe check you can try

1. Turn the fan off and let the hood cool. 2. Slide out the metal grease filters. 3. Wash them in the dishwasher or in hot detergent solution. 4. Let them dry thoroughly before replacing them. 5. Clear the reminder from the hood control. If F returns right away, call us.

! Why to stop there

A clogged filter hurts airflow and is a fire concern.
The reminder is simple, but a stuck F points to the control.
A visit, if needed, comes with a written price and 30-day workmanship coverage.

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

CJennAir Hood Display C: Time to clean the charcoal filters

FF questions

How often will F appear?

After every 30 hours of fan operation, so it will come up regularly with normal cooking. It shows only while the fan is active, and it clears once the grease filters are cleaned.

Can I put the filters in the dishwasher?

Yes. The metal filters can go in the dishwasher or be soaked in hot detergent solution. Let them dry fully before they go back in, because damp filters can drip and spot the hood.

Is F the same as C?

No. F is the grease filter reminder at 30 hours of fan operation, while C is the charcoal filter reminder at 120 hours. Each filter type has its own interval and its own cleaning step.