--- title: "JennAir hood display shows F while the fan runs" description: "What F means on JennAir hood display shows F while the fan runss, what to check before booking, and when it is not a failure at all." url: "https://rangehooderepair.center/error-codes/jennair-f/" --- # JennAir hood display shows F while the fan runs JennAir's display hoods log how long the fan has run. ## What F actually means. JennAir's display hoods log how long the fan has run. After 30 hours they flag the metal grease filters with an F that shows only while the fan is working. The letter is a maintenance flag set by a timer, and it stays until someone holds the reset. JennAir range hood display What to do when F shows on the range hood ### Kind of code Filter reminders The hood has counted enough hours of fan time to ask for its filters: the mesh or baffle grease filters want a wash, or on a recirculating hood the charcoal filters want replacing. Most hoods count hours rather than measure grease, so the light comes on whether the filters are clean or not, and it stays on until it is reset with the key the manual names. A reminder that returns straight after a reset, or a hood that still pulls weakly with fresh filters, is worth a visit. ### Usually leads to Range hood filter and baffle service Cleaning or replacing what catches grease and odor: mesh and baffle filters, charcoal pads on recirculating hoods, and the grease channel. ### Shows up as Reading a Range Hood Error Code or Blinking Light A range hood error code may appear as letters and numbers on a display, a light that blinks in a pattern, a filter reminder that will not clear, or a beep with the fan refusing to start. ### Make JennAir JennAir hoods and downdraft vents are diagnosed at home, with the lift, the blower and the touch controls each tested on the call. ### Source JennAir Product Help: F - Displayed (vent hoods) JennAir's help site lists F for its display vent hoods without naming the models; JennAir telescoping downdrafts (JXD7030Y, JXD7036Y) use a slider and have no display. ## Before you book, in this order. Each step comes from JennAir's own guidance for F on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 Switch the fan off, wait for the hood to cool and take the metal grease filters down. 02 Clean them in the dishwasher or a hot detergent soak and let them dry thoroughly before refitting. 03 Hold FAN for 3 seconds to clear the alarm. 04 Book a visit if the F cannot be cleared or reappears the next time the fan starts. ### Still there? It usually turns into [range hood filter and baffle service](https://rangehooderepair.center/services/range-hood-filter-and-baffle-service/). Book with the code and the model number. ### What not to do A JennAir F on the hood is not a numbered error code and does not report a failed blower or board. JennAir's F-codes on its cooking surfaces and microwave hood combinations are a different system and do not apply to a vent hood. ## What you may notice with it. The range hood problems F tends to arrive with. Answer these at the range hood before anyone is booked. [All problems](https://rangehooderepair.center/problems/) Before you call ### [Reading a Range Hood Error Code or Blinking Light](https://rangehooderepair.center/problems/range-hood-error-code/) [All 7 causes, cheapest first](https://rangehooderepair.center/problems/range-hood-error-code/) It also comes with - [**Grease or Oily Water Dripping From the Range Hood**](https://rangehooderepair.center/problems/range-hood-dripping-grease/) - [**Range Hood Runs but Barely Pulls Smoke**](https://rangehooderepair.center/problems/range-hood-weak-suction/) Problem ### Reading a Range Hood Error Code or Blinking Light 7 causes, cheapest first Where F usually leads ## Range hood filter and baffle service. **Mesh or baffle filters, charcoal pads and the grease channel · lowest.** Book a visit [What the job involves](https://rangehooderepair.center/services/range-hood-filter-and-baffle-service/) ## JennAir range hoods. JennAir hoods and downdraft vents are diagnosed at home, with the lift, the blower and the touch controls each tested on the call. [JennAir range hood repair](https://rangehooderepair.center/brands/jennair/) More JennAir codes [C](https://rangehooderepair.center/error-codes/jennair-c/) Filter reminders on other makes [Bertazzoni F](https://rangehooderepair.center/error-codes/bertazzoni-f/) [BEST Fan LED bar flashes slowly for 30 seconds after the fan is turned off](https://rangehooderepair.center/error-codes/best-fan-led-bar-flashing-after-off/) [BlueStar Timer icon blinking, blower off](https://rangehooderepair.center/error-codes/bluestar-timer-icon-fan-off/) [Bosch clean grease filter](https://rangehooderepair.center/error-codes/bosch-clean-grease-filter/) [Dacor Low button blinking](https://rangehooderepair.center/error-codes/dacor-low-button-blinking/) [Elica Grease Filter](https://rangehooderepair.center/error-codes/elica-grease-filter/) [Faber Filter alarm LED on (steady)](https://rangehooderepair.center/error-codes/faber-filter-alarm-led-on/) [Falmec Red LED steady on with the fan off](https://rangehooderepair.center/error-codes/falmec-red-led-steady/) [All 61 codes of this kind](https://rangehooderepair.center/error-codes/#family-filter) JennAir builds this ### Wall-mount range hood The chimney hood fixed to a bare stretch of wall above the burners, its canopy catching the rising smoke while a telescoping cover hides the duct that climbs to the ceiling. JennAir builds this ### Under-cabinet range hood The slim hood screwed to the bottom of the wall cabinet over the burners, venting up through that cabinet or back through the wall, or cleaning the air and returning it to the room. JennAir builds this ### Island range hood The hood that hangs from the ceiling over burners set into a kitchen island, open on all four sides, with its duct and wiring hidden inside a chimney that drops from above. ## In JennAir's own words > After 30 hours of fan operation, the display will show “F” when the fan is active. [JennAir Product Help: F - Displayed (vent hoods)](https://producthelp.jennair.com/Cooking/Ventilation_and_Hoods/Vent_Hoods/Operation/Error_Codes/F_-_Displayed) [JennAir Product Help: F - Displayed (vent hoods)](https://producthelp.jennair.com/Cooking/Ventilation_and_Hoods/Vent_Hoods/Operation/Error_Codes/F_-_Displayed) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. JennAir's help site lists F for its display vent hoods without naming the models; JennAir telescoping downdrafts (JXD7030Y, JXD7036Y) use a slider and have no display. ## JennAir F range hood repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Switch the fan off, wait for the hood to cool and take the metal grease filters down. If it comes back, it needs a visit. ### Is F on my JennAir hood the same as an F error on my JennAir burners? No. On the hood, a lone F is only the 30-hour grease filter alarm. The F-codes on JennAir cooking surfaces are unrelated error codes. ### Why does F on my JennAir hood disappear when the fan is off? JennAir only shows the alarm while the fan runs. It has not cleared itself; hold FAN for 3 seconds after cleaning the filters. ### Do I need new grease filters when my JennAir hood shows F? Usually not. The metal filters wash in the dishwasher or a hot detergent soak; replace them only if the mesh is bent or torn. --- **[Read on the site: JennAir hood display shows F while the fan runs](https://rangehooderepair.center/error-codes/jennair-f/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**