Zephyr ACT 390, ACT 590 or ACT OFF: the installer's airflow cap
Airflow Control Technology lets the installer cap a Zephyr hood's top airflow, for example to stay under a make-up air limit.
Mon–Sat, 8am–8pm
- Mode, not a failure
- No repair needed
- Source: Zephyr
Book a visit
Three short steps, about a minute.
or call (844) 398-3217
Loading appointment form…
The appointment form couldn’t load. Please try again.
What ACT 390
actually means.
Airflow Control Technology lets the installer cap a Zephyr hood's top airflow, for example to stay under a make-up air limit. Holding ON/OFF for 3 seconds with the hood off shows ACT 390, ACT 590 or ACT 290 when a cap is active, or ACT OFF when it is not. With a cap on, the hood offers fewer fan speeds.
Zephyr range hood display · also shown as ACT 590, ACT 290, ACT OFF
What to do when ACT 390 shows on the range hoodKind of codeMode, 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 toNo repair
Nothing needs fixing; the number is a setting.
Shows up asReading 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.
MakeZephyr
Zephyr hoods with unresponsive touch controls, dim lamps or a fan that drifts on without being asked are checked at your home.
SourceZephyr Siena Pro use, care and installation guide
Siena Pro and Tornado LCD hoods display it as text; LED-only hoods such as Anzio and Ombra show the cap by how many speed lights come on.
Before you book,
in this order.
Each step comes from Zephyr's own guidance for ACT 390 on its range hoods. Follow it to the end: the last card says whether this is a visit.
Nothing needs fixing; the number is a setting.
If the hood seems to have lost its top speeds, check the ACT readout before assuming the blower is weak.
The cap is changed with a jumper on the board inside the hood, so book a visit rather than opening it yourself.
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
ACT readings are not error codes or temperatures. A hood that shows ACT OFF and still pulls poorly has a duct, damper or blower issue instead.
What you may
notice with it.
The range hood problems ACT 390 tends to arrive with. Answer these at the range hood before anyone is booked.
All problems
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.
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 repairMore Zephyr codes
Mode, not a failure on other makes
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.
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.
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
The LCD will display up to three options depending on the settings, "ACT 390", "ACT 590", and "ACT OFF".
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Siena Pro and Tornado LCD hoods display it as text; LED-only hoods such as Anzio and Ombra show the cap by how many speed lights come on.
Zephyr ACT 390 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.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about ACT 390.
Can I clear ACT 390 myself?
Why does my Zephyr only have four speeds instead of five?
Can a Zephyr ACT setting be changed later?
Where else can I see the Zephyr ACT setting?
Back to your everyday
Still showing ACT 390?
Three things make the booking useful: the letters or blink pattern exactly as they showed, the full model number from the label behind the filters, and whether the fan still moves air on every speed. With those, the technician arrives with half the answer already worked out.