Thermador FILTER key lit: 40 hours of blower time on a Masterpiece or Professional hood
Thermador's touch-control hoods count how long the blower has run.
Mon–Sat, 8am–8pm
- Filter reminders
- Range hood filter and baffle service
- Source: Thermador
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Three short steps, about a minute.
or call (844) 398-3217
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What FILTER lit
actually means.
Thermador's touch-control hoods count how long the blower has run. At 40 hours the FILTER key lights and stays lit, whatever the filters actually look like. The same reminder can be sent to a phone through the Home Connect app when that option is switched on.
Thermador range hood display · also shown as FILTER button illuminated, Clean filter reminder
What to do when FILTER lit shows on the range hoodKind of codeFilter 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 toRange 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 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.
MakeThermador
Thermador hoods, inserts and downdraft vents are repaired on a home visit that begins by watching the owner run the fan.
SourceThermador Professional Series Hoods Use and Care Guide (PH, VCIN, HPCN)
Masterpiece chimney wall, island, drawer and custom insert hoods (HMCB, HMIB, HDDB, VCI) and Professional Series wall, chimney and insert hoods (PH, HPCN, VCIN).
Before you book,
in this order.
Each step comes from Thermador's own guidance for FILTER lit on its range hoods. Follow it to the end: the last card says whether this is a visit.
Turn the hood off and let it cool, then take down the baffle or mesh filters and wash them.
Refit the filters and check each one is locked into its track.
Press and hold FILTER for three seconds until the hood beeps; the light goes out and the 40-hour count restarts.
If the key lights again within a day or two, book a visit so the control can be checked.
Still there?
It usually turns into range hood filter and baffle service. Book with the code and the model number.
What not to do
A lit FILTER key does not mean the blower or the heat sensor has a problem. On the Masterpiece downdraft the reminder behaves differently, with a blinking FILTER icon after 30 hours.
What you may
notice with it.
The range hood problems FILTER lit tends to arrive with. Answer these at the range hood before anyone is booked.
All problems
Where FILTER lit usually leads
Range hood filter and baffle service.
Thermador
range hoods.
Thermador hoods, inserts and downdraft vents are repaired on a home visit that begins by watching the owner run the fan.
Thermador range hood repairMore Thermador codes
Filter reminders 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.
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.
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 Thermador's own words
After 40 hours of operation, the FILTER button illuminates.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Masterpiece chimney wall, island, drawer and custom insert hoods (HMCB, HMIB, HDDB, VCI) and Professional Series wall, chimney and insert hoods (PH, HPCN, VCIN).
Thermador FILTER lit 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 FILTER lit.
Can I clear FILTER lit myself?
Does the Thermador FILTER light measure how greasy the filters are?
Can the Thermador hood tell my phone when the filters need cleaning?
I held FILTER on my Thermador hood but nothing happened. Why?
Back to your everyday
Still showing FILTER lit?
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.