--- title: "Viking wall hood blower starts on high by itself" description: "What Blower comes on at high by itself means on Viking wall hood blower starts on high by itselfs, what to check before booking, and when it is not a failure at…" url: "https://rangehooderepair.center/error-codes/viking-heat-sensor-high/" --- # Viking wall hood blower starts on high by itself Viking fits a heat sensor thermostat to its wall hoods. ## What Blower comes on at high by itself actually means. Viking fits a heat sensor thermostat to its wall hoods. When it senses excessive heat above the burners, it turns the blower on at high or raises it from a lower speed. Once the temperature is back to normal, the blower returns to its original setting. Viking range hood display · also shown as heat sensor thermostat What to do when Blower comes on at high by itself 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 Turn down the burners or griddle, and let the hood cool. ### 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 Viking Viking range hoods that have grown loud, weak or dark are looked at in place, from the lamps and switches to the blower overhead. ### Source Viking 3 Series chimney wall hoods RVCH330/RVCH336 use and care Viking 3 Series RVCH chimney wall hoods and 5 Series wall hoods (heat sensor listed on the 10-inch VWH specification sheet and the 5 Series use and care guide). ## Before you book, in this order. Each step comes from Viking's own guidance for Blower comes on at high by itself on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 Turn down the burners or griddle, and let the hood cool. 02 Leave the blower running until it drops back by itself. 03 Before cleaning, disconnect the hood's power, since the sensor can start the blower. 04 If the blower keeps running on high with the burners off and the hood cool, 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 A blower on high by itself is not a stuck knob or failed switch while the area is hot. If there is flame in the pan or the hood, treat it as a grease fire: burner off, no water, lid on the pan, and leave and call 911 if it spreads to the hood or cabinets. ## What you may notice with it. The range hood problems Blower comes on at high by itself 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/) - [**Range Hood Too Loud: Roar, Whine or Grinding**](https://rangehooderepair.center/problems/range-hood-loud-noise/) 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/) ## Viking range hoods. Viking range hoods that have grown loud, weak or dark are looked at in place, from the lamps and switches to the blower overhead. [Viking range hood repair](https://rangehooderepair.center/brands/viking/) More Viking codes [Filter clean icon blinking](https://rangehooderepair.center/error-codes/viking-filter-clean-icon-blinking/) [Green indicator LED](https://rangehooderepair.center/error-codes/viking-green-led/) [First white fan-speed LED flashing](https://rangehooderepair.center/error-codes/viking-first-white-led-flashing/) [Fourth white LED lit](https://rangehooderepair.center/error-codes/viking-fourth-white-led/) 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 78 codes of this kind](https://rangehooderepair.center/error-codes/#family-mode) Viking 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. Viking 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. Viking 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 Viking's own words > If the blower is OFF - the sensor turns the blower on to HIGH speed. [Viking 3 Series chimney wall hoods RVCH330/RVCH336 use and care](https://middleby-cdn.com/usermanuals/Viking_RVCH_Hood_Manual_1.pdf) [Viking 5 Series 10-inch wall hoods specification sheet](https://middleby-cdn.com/specsheets/Viking_10inchVWH_Hood_SpecSheet_1.pdf) [Viking 5 Series professional hoods use and care guide F21286](https://middleby-cdn.com/usermanuals/Viking_5SeriesVentilation18inch_F21286_EN_UseCare.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Viking 3 Series RVCH chimney wall hoods and 5 Series wall hoods (heat sensor listed on the 10-inch VWH specification sheet and the 5 Series use and care guide). ## Viking Blower comes on at high by itself 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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Turn down the burners or griddle, and let the hood cool. ### Why did my Viking hood fan start while I was wiping it down? Warm surfaces can trip the heat sensor. Viking asks you to disconnect power before cleaning for exactly this reason. ### Can I turn the heat sensor off on my Viking hood? Viking's guides describe no switch for it. It is a safety feature that ends by itself once the area cools. ### How do I know the heat sensor on my Viking hood has failed? If the blower goes to high on a cold hood, or never falls back after cooking ends, have it tested on a visit. --- **[Read on the site: Viking wall hood blower starts on high by itself](https://rangehooderepair.center/error-codes/viking-heat-sensor-high/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**