--- title: "Zephyr showing A and then 1: Clean Air mode is running the fan" description: "What A then 1 means on Zephyrs, what to check before booking, and when it is not a failure at all." url: "https://rangehooderepair.center/error-codes/zephyr-a1/" --- # Zephyr showing A then 1 Clean Air switches the hood on every 4 hours for 10 minutes to move air through the home. ## What A then 1 actually means. Clean Air switches the hood on every 4 hours for 10 minutes to move air through the home. While it runs, the display shows A and then 1, the speed it uses. Nothing is wrong; the fan starting on its own is the feature doing its job. Zephyr range hood display · also shown as A1, A, Clean Air What to do when A then 1 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 want it, leave it; the fan stops again after 10 minutes. ### 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 Zephyr Zephyr hoods with unresponsive touch controls, dim lamps or a fan that drifts on without being asked are checked at your home. ### Source Zephyr Help Center: Range Hood Troubleshooting Zephyr hoods with a single-character display and the Clean Air feature; the help center gives the on/off steps. ## Before you book, in this order. Each step comes from Zephyr's own guidance for A then 1 on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 If you want it, leave it; the fan stops again after 10 minutes. 02 To switch it off, with the hood off hold the on/off button about 5 seconds until the display goes from A to a dash. 03 If the fan still starts by itself with Clean Air off, try a power reset at the breaker for 5 to 10 minutes, then book a visit if it continues. ### 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 A then 1 is not a numbered error code, and it does not point to a stuck relay. A fan that runs nonstop, not in 10-minute bursts, is a different problem. ## What you may notice with it. The range hood problems A then 1 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/) ## Zephyr range hoods. Zephyr hoods with unresponsive touch controls, dim lamps or a fan that drifts on without being asked are checked at your home. [Zephyr range hood repair](https://rangehooderepair.center/brands/zephyr/) More Zephyr codes [F](https://rangehooderepair.center/error-codes/zephyr-f/) [C](https://rangehooderepair.center/error-codes/zephyr-c/) [CLEAN GREASE FILTERS HOLD FAN- TO RESET](https://rangehooderepair.center/error-codes/zephyr-clean-grease-filters-hold-fan-to-reset/) [FAN- button slowly blinking](https://rangehooderepair.center/error-codes/zephyr-fan-minus-blinking/) [Clean filters indicator on or flashing](https://rangehooderepair.center/error-codes/zephyr-clean-filters-indicator/) [Filter button slowly blinking (30 or 120 hours)](https://rangehooderepair.center/error-codes/zephyr-filter-button-slowly-blinking/) [ACT 390](https://rangehooderepair.center/error-codes/zephyr-act-390/) [PAIRING](https://rangehooderepair.center/error-codes/zephyr-pairing/) [HELLO](https://rangehooderepair.center/error-codes/zephyr-hello/) [Filter clean icon blinking](https://rangehooderepair.center/error-codes/zephyr-lift-filter-icon-blinking/) [Dot flashing in the lower right of the display](https://rangehooderepair.center/error-codes/zephyr-dot-flashing/) 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 76 codes of this kind](https://rangehooderepair.center/error-codes/#family-mode) Zephyr 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. Zephyr 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. Zephyr 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 Zephyr's own words > This means the Clean Air feature is activated. [Zephyr Help Center: Range Hood Troubleshooting](https://helpcenter.zephyronline.com/hc/en-us/articles/36460141490189-Range-Hood-Troubleshooting) [Zephyr Help Center: How Do I Enable Or Disable The Clean Air Feature?](https://helpcenter.zephyronline.com/hc/en-us/articles/18602886854285-How-Do-I-Enable-Or-Disable-The-Clean-Air-Feature) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Zephyr hoods with a single-character display and the Clean Air feature; the help center gives the on/off steps. ## Zephyr A then 1 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 want it, leave it; the fan stops again after 10 minutes. ### Why does my Zephyr hood turn on in the middle of the night? Clean Air is likely on. It runs the fan for 10 minutes every 4 hours whether or not anyone is cooking. ### How do I turn off Clean Air on a Zephyr? With the hood off, press and hold on/off for about 5 seconds until the display changes from A to a dash. ### Does Clean Air wear out my Zephyr blower? It adds run time at a low speed, which is light duty. If the noise bothers you at night, switching the feature off is the simple answer. --- **[Read on the site: Zephyr showing A and then 1: Clean Air mode is running the fan](https://rangehooderepair.center/error-codes/zephyr-a1/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**