--- title: "Gaggenau run-on key and fan level blinking in turn: interval ventilation is on" description: "What Run-on key and fan level flash alternately means on Gaggenau run-on key and fan level blinking in turn: interval ventilation is ons, what to check before…" url: "https://rangehooderepair.center/error-codes/gaggenau-interval-ventilation/" --- # Gaggenau run-on key and fan level blinking in turn: interval ventilation is on Interval ventilation runs the fan on its own for a few minutes every hour to keep air moving in the kitchen: five minutes on the AF 210 visor hood, six on the AL 400. ## What Run-on key and fan level flash alternately actually means. Interval ventilation runs the fan on its own for a few minutes every hour to keep air moving in the kitchen: five minutes on the AF 210 visor hood, six on the AL 400. Gaggenau shows it with the run-on key and the chosen fan level alternating. It continues until you switch the hood off. Gaggenau range hood display · also shown as Interval ventilation on What to do when Run-on key and fan level flash alternately shows on the range hood ### Kind of code Mode, not a failure The hood is doing something it was told to do, not wearing out: a delay-off timer that keeps the blower running for some minutes after the burners go off, a heat sentry that starts the fan by itself when it senses a hot pan, a Sabbath setting that locks the keys and dims the lights, or a link to the cooking surface that sets the speed on its own. No part is needed; a key sequence from the manual, or simply waiting, ends it. ### Usually leads to No repair If you meant to set it, nothing is needed; the fan will cycle hourly. ### 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 Gaggenau A Gaggenau hood or downdraft vent is repaired where it is installed, after the technician has seen how its air leaves the house. ### Source Gaggenau AF 2.. visor hood Use and care manual and installation instructions 200 series visor hood AF 210 (five minutes per hour) and 400 series retractable downdraft AL 400 722/792 (six minutes per hour). ## Before you book, in this order. Each step comes from Gaggenau's own guidance for Run-on key and fan level flash alternately on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 If you meant to set it, nothing is needed; the fan will cycle hourly. 02 To end it, press the fan on/off key. 03 If the fan keeps cycling after it has been switched off, book a visit. ### Cleared? The code is gone and the blower pulls steam up on every speed again without a new part. If it returns this week, or the filter reminder keeps coming back right after a cleaning, mention it in the booking. ### What not to do The alternating lights are not a warning and not a stuck key. A single steady run-on light means the ordinary run-on function, which stops by itself after a set time. ## What you may notice with it. The range hood problems Run-on key and fan level flash alternately 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 - [**Range Hood Fan Won't Turn Off**](https://rangehooderepair.center/problems/range-hood-fan-wont-turn-off/) Problem ### Reading a Range Hood Error Code or Blinking Light 7 causes, cheapest first No repair indicated ## Nothing to repair. The hood is doing something it was told to do, not wearing out: a delay-off timer that keeps the blower running for some minutes after the burners go off, a heat sentry that starts the fan by itself when it senses a hot pan, a Sabbath setting that locks the keys and dims the lights, or a link to the cooking surface that sets the speed on its own. No part is needed; a key sequence from the manual, or simply waiting, ends it. [How to read what your range hood is telling you](https://rangehooderepair.center/problems/range-hood-error-code/) ## Gaggenau range hoods. A Gaggenau hood or downdraft vent is repaired where it is installed, after the technician has seen how its air leaves the house. [Gaggenau range hood repair](https://rangehooderepair.center/brands/gaggenau/) More Gaggenau codes [Saturation display blinking](https://rangehooderepair.center/error-codes/gaggenau-saturation-display-blinking/) [All buttons flash, hood not working](https://rangehooderepair.center/error-codes/gaggenau-all-buttons-flash/) [Ring flashes white slowly three times](https://rangehooderepair.center/error-codes/gaggenau-ring-white-slow-three/) [Ring flashes white rapidly six times](https://rangehooderepair.center/error-codes/gaggenau-ring-white-rapid-six/) [Ring flashes orange slowly](https://rangehooderepair.center/error-codes/gaggenau-ring-orange-slow/) [Ring flashes orange and white alternately](https://rangehooderepair.center/error-codes/gaggenau-ring-orange-white/) [Ring flashes yellow and magenta](https://rangehooderepair.center/error-codes/gaggenau-ring-yellow-magenta/) [Ring green, then yellow](https://rangehooderepair.center/error-codes/gaggenau-ring-green-then-yellow/) Mode, not a failure on other makes [Bertazzoni C](https://rangehooderepair.center/error-codes/bertazzoni-c/) [BEST Fan LED bar flashes slowly and fan speed cannot be changed](https://rangehooderepair.center/error-codes/best-heat-sentry-fan-light-flashing/) [BlueStar Timer icon blinking, blower running](https://rangehooderepair.center/error-codes/bluestar-timer-icon-fan-on/) [Bosch End](https://rangehooderepair.center/error-codes/bosch-end/) [Café Low, Med and High LEDs rolling blink](https://rangehooderepair.center/error-codes/cafe-low-med-high-rolling-blink/) [Dacor Timer LED blinking](https://rangehooderepair.center/error-codes/dacor-timer-led-blinking/) [Elica Snd](https://rangehooderepair.center/error-codes/elica-snd/) [Faber Intensive speed drops back after 6 or 10 minutes](https://rangehooderepair.center/error-codes/faber-intensive-speed-timer/) [All 79 codes of this kind](https://rangehooderepair.center/error-codes/#family-mode) Gaggenau 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. Gaggenau 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. Gaggenau 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 Gaggenau's own words > For interval ventilation, the device is switched on automatically for five minutes per hour. [Gaggenau AF 2.. visor hood Use and care manual and installation instructions](https://media3.bsh-group.com/Documents/9001151282_N.pdf) [Gaggenau AF 2.. visor hood Use and care manual and installation instructions](https://media3.bsh-group.com/Documents/9001151282_N.pdf) [Gaggenau AL 400 722/792 backsplash ventilation Use and care manual](https://media3.bsh-group.com/Documents/9001614567_A.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. 200 series visor hood AF 210 (five minutes per hour) and 400 series retractable downdraft AL 400 722/792 (six minutes per hour). ## Gaggenau Run-on key and fan level flash alternately 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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If you meant to set it, nothing is needed; the fan will cycle hourly. ### Why does my Gaggenau hood start by itself every hour? Interval ventilation is on. Look for the run-on key and a fan-level key blinking in turn, and switch the hood off to end it. ### How do I turn on interval ventilation on a Gaggenau visor hood? Switch the hood on, then press the run-on key twice. It works at fan levels 1, 2 or 3. ### Does the Gaggenau downdraft need to be up for interval ventilation? Yes. The AL 400 only runs when it is fully extended, so it stays raised while the mode is active. --- **[Read on the site: Gaggenau run-on key and fan level blinking in turn: interval ventilation is on](https://rangehooderepair.center/error-codes/gaggenau-interval-ventilation/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**