--- title: "BEST calibration light blinking nonstop: the duct is too restrictive for full airflow" description: "What Calibration button light blinks continuously means on BEST calibration light blinking nonstop: the duct is too restrictive for full airflows, what to check…" url: "https://rangehooderepair.center/error-codes/best-calibration-light-blinking/" --- # BEST calibration light blinking nonstop: the duct is too restrictive for full airflow BEST hoods with the IQ Blower System run a calibration after installation. ## What Calibration button light blinks continuously actually means. BEST hoods with the IQ Blower System run a calibration after installation. A steady light at the end means it passed; a light that blinks without stopping means the duct run is too restrictive, and the blower sets itself to maximum intensity to make up what it can. BEST lists a stuck damper flap, too many elbows, undersized or crushed duct and flex duct as the usual causes. BEST range hood display · also shown as IQ Blower calibration, too much restriction What to do when Calibration button light blinks continuously shows on the range hood ### Kind of code Damper and downdraft Something along the path of the air has stopped moving as it should: a motorized backdraft damper that no longer opens when the fan starts, one that sticks open and lets cold air or rain in, or on a downdraft the lift motor and its limit switches that raise the vent behind the burners. A damper taped shut since installation or a pan handle dropped into a downdraft slot can bring on the same code, so the easy checks come first. ### Usually leads to Range hood damper and duct repair Getting the air out of the house: the backdraft damper, the duct and its joints, the wall or roof cap, and make-up air in a tight house. ### 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 BEST BEST hood inserts and chimney hoods get a visit that traces the airflow from the filters up to wherever the blower is mounted. ### Source BEST WPP1 series chimney hood installation instructions WPP1 chimney hoods and hoods fitted with the iQ12 internal blower, such as the UP26 and WP28 pro-style models. The button sits inside the hood near the blower. ## Before you book, in this order. Each step comes from BEST's own guidance for Calibration button light blinks continuously on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 Check the outside wall cap or roof cap for a flap that is stuck, painted over or blocked by a nest. 02 If you want to keep things as they are, press the calibration button once to accept the airflow; the blinking stops. 03 Book a visit if the duct needs changes, then have the calibration cleared with a 10-second press and run again. ### Still there? It usually turns into [range hood damper and duct repair](https://rangehooderepair.center/services/range-hood-damper-and-duct-repair/). Book with the code and the model number. ### What not to do The blinking does not mean the blower motor is weak or failing. It also has nothing to do with the filter reminders, which appear on the speed or fan lights instead of the calibration button. ## What you may notice with it. The range hood problems Calibration button light blinks continuously 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 Runs but Barely Pulls Smoke**](https://rangehooderepair.center/problems/range-hood-weak-suction/) - [**Range Hood Too Loud: Roar, Whine or Grinding**](https://rangehooderepair.center/problems/range-hood-loud-noise/) - [**Cold Draft or a Flapping Damper Through the Range Hood**](https://rangehooderepair.center/problems/range-hood-cold-draft-or-damper-flapping/) Problem ### Reading a Range Hood Error Code or Blinking Light 7 causes, cheapest first Where Calibration button light blinks continuously usually leads ## Range hood damper and duct repair. **Backdraft damper, duct joints or the outside cap flap · low to moderate.** Book a visit [What the job involves](https://rangehooderepair.center/services/range-hood-damper-and-duct-repair/) ## BEST range hoods. BEST hood inserts and chimney hoods get a visit that traces the airflow from the filters up to wherever the blower is mounted. [BEST range hood repair](https://rangehooderepair.center/brands/best/) More BEST codes [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/) [Fan LED bar flashes slowly and fan speed cannot be changed](https://rangehooderepair.center/error-codes/best-heat-sentry-fan-light-flashing/) [All 4 blower speed lights flash for 30 seconds](https://rangehooderepair.center/error-codes/best-four-speed-lights-flashing/) [Speed 4 button flashing, speed 3 lit](https://rangehooderepair.center/error-codes/best-speed-4-flashing/) [Speed indicator LED flashing after pressing delay-off](https://rangehooderepair.center/error-codes/best-speed-light-flashing-delay-off/) [WiFi LED flashing](https://rangehooderepair.center/error-codes/best-wifi-led-flashing/) Damper and downdraft on other makes [Sirius Pushbutton panel blinking during calibration](https://rangehooderepair.center/error-codes/sirius-downdraft-buttons-blinking/) BEST 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. BEST 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. BEST builds this ### Range hood insert The working core of a custom hood: a steel liner or power pack carrying the blower, filters, lights and controls, fitted inside a hood built of wood, plaster or metal by a cabinetmaker. ## In BEST's own words > calibration button light blinks continuously = Too much restriction in the ductwork is preventing the IQ Blower System™ from achieving the rated airflow. [BEST WPP1 series chimney hood installation instructions](https://bestrangehoods.com/api/media/file/WPP1-Installation-Guide-1a8e5346-a29e-4652-9f8e-bd92c0e60e81.pdf) [BEST WPP1 series chimney hood installation instructions](https://bestrangehoods.com/api/media/file/WPP1-Installation-Guide-1a8e5346-a29e-4652-9f8e-bd92c0e60e81.pdf) [BEST iQ12 internal blower installation guide](https://bestrangehoods.com/api/media/file/Installation_Guide_iQ12_trilingual-160c4b94-f54e-4587-b1cf-01fb98d45dce.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. WPP1 chimney hoods and hoods fitted with the iQ12 internal blower, such as the UP26 and WP28 pro-style models. The button sits inside the hood near the blower. ## BEST Calibration button light blinks continuously 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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Check the outside wall cap or roof cap for a flap that is stuck, painted over or blocked by a nest. If it comes back, it needs a visit. ### What does a steady calibration light mean on a BEST hood? It means the calibration succeeded. Press the button to turn the light off, or pick any blower speed and it goes out. ### Can I ignore a blinking calibration light on my BEST hood? You can accept the airflow by pressing the button once, and the hood runs at the best it can manage. It will still be louder and pull less than rated until the duct is improved. ### How do I rerun the calibration on a BEST IQ Blower? Hold the calibration button for 10 seconds; it blinks three times and the settings return to default. Then start the calibration again with a 3-second press. --- **[Read on the site: BEST calibration light blinking nonstop: the duct is too restrictive for full airflow](https://rangehooderepair.center/error-codes/best-calibration-light-blinking/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**