--- title: "Bosch \"Auto\" on a wall hood: overheating protection has taken over the fan" description: "What Auto means on Bosch \"Auto\" on a wall hood: overheating protection has taken over the fans, what to check before booking, and when it is not a failure at…" url: "https://rangehooderepair.center/error-codes/bosch-auto/" --- # Bosch "Auto" on a wall hood: overheating protection has taken over the fan Bosch wall hoods carry overheating protection. ## What Auto actually means. Bosch wall hoods carry overheating protection. When the appliance gets too hot, the fan jumps to the highest level, even if the hood was off, and the display shows Auto. You cannot turn the speed down until the temperature drops; the hood then returns to your setting, or shuts off if it had been off. Bosch range hood display · also shown as AUTO What to do when Auto shows on the range hood ### Kind of code Heat and grease sensors A sensor inside the canopy has stopped telling the control a believable story: the heat sensor that starts the fan when the air above the burners gets hot, or on some hoods a sensor that reads grease or steam to set the speed. One that reads hot all the time keeps the blower running with the burners long cold; one that reads nothing leaves the automatic mode doing nothing. The sensor, its wiring and the canopy around it are checked at the visit. ### Usually leads to Range hood heat sensor repair Testing the sensor that starts the fan by itself when the burners get hot, so the hood starts when it should and stops when the heat is gone. ### 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 Bosch Bosch range hoods and downdraft vents get a home visit in which the touch controls and the fan's timed shut-off are checked before anything is opened. ### Source Bosch Hood Use and Care Manual HCP30651UC, HCP36651UC, HCP80641UC, HCP86641UC Bosch wall hoods HCP30651UC, HCP36651UC, HCP80641UC, HCP86641UC and HCB50651UC, HCB56651UC. ## Before you book, in this order. Each step comes from Bosch's own guidance for Auto on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 Let the fan run at full speed; it is carrying heat away from the hood. 02 Turn down or switch off burners that are running very high, and do not leave a hot empty pan on the heat. 03 Wait for Auto to clear on its own once the hood cools. 04 If Auto shows up with only light cooking below, book a visit so the temperature sensing can be checked. ### Still there? It usually turns into [range hood heat sensor repair](https://rangehooderepair.center/services/range-hood-heat-sensor-repair/). Book with the code and the model number. ### What not to do Auto here is not an automatic mode you switched on; this hood's display uses the word for its overheating protection. Flames or smoke inside the hood are a fire, not this message, and need the burner off and the safety steps first. ## What you may notice with it. The range hood problems Auto 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 Stuck on One Speed**](https://rangehooderepair.center/problems/range-hood-stuck-on-one-speed/) - [**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 Where Auto usually leads ## Range hood heat sensor repair. **Heat sensor or thermostat disc and its lead · low.** Book a visit [What the job involves](https://rangehooderepair.center/services/range-hood-heat-sensor-repair/) ## Bosch range hoods. Bosch range hoods and downdraft vents get a home visit in which the touch controls and the fan's timed shut-off are checked before anything is opened. [Bosch range hood repair](https://rangehooderepair.center/brands/bosch/) More Bosch codes [clean grease filter](https://rangehooderepair.center/error-codes/bosch-clean-grease-filter/) [replace charcoal filter](https://rangehooderepair.center/error-codes/bosch-replace-charcoal-filter/) [End](https://rangehooderepair.center/error-codes/bosch-end/) [Snd](https://rangehooderepair.center/error-codes/bosch-snd/) [Able](https://rangehooderepair.center/error-codes/bosch-able/) [GREASE FILTER lit](https://rangehooderepair.center/error-codes/bosch-grease-filter-key-lit/) [CHARCOAL FILTER lit](https://rangehooderepair.center/error-codes/bosch-charcoal-filter-key-lit/) [CONNECT and 2 flashing](https://rangehooderepair.center/error-codes/bosch-connect-2-flashing/) [Two short beeps](https://rangehooderepair.center/error-codes/bosch-two-short-beeps/) [Filter key flashes slowly at switch-off](https://rangehooderepair.center/error-codes/bosch-filter-key-flashing/) [Fan key backlight flashes slowly](https://rangehooderepair.center/error-codes/bosch-fan-key-flashing/) Heat and grease sensors on other makes [Elica CArE](https://rangehooderepair.center/error-codes/elica-care/) [GE Profile Indoor Air Quality (IAQ) LED changing color](https://rangehooderepair.center/error-codes/ge-profile-iaq-led/) [Monogram Indoor Air Quality (IAQ) LED](https://rangehooderepair.center/error-codes/monogram-iaq-led/) [Sirius Motor stops during high-heat cooking](https://rangehooderepair.center/error-codes/sirius-thermal-overload/) [Thermador AUTO blinks 3 times](https://rangehooderepair.center/error-codes/thermador-downdraft-auto-blinks/) Bosch 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. Bosch 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. Bosch 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 Bosch's own words > While the overheating protection is active, "Auto" appears on the display panel. [Bosch Hood Use and Care Manual HCP30651UC, HCP36651UC, HCP80641UC, HCP86641UC](https://media3.bsh-group.com/Documents/8001369736_A.pdf) [Bosch Hood Use and Care Manual HCP30651UC, HCP36651UC, HCP80641UC, HCP86641UC](https://media3.bsh-group.com/Documents/8001369736_A.pdf) [Bosch Hood Use and Care Manual HCB50651UC, HCB56651UC](https://media3.bsh-group.com/Documents/8001369725_A.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Bosch wall hoods HCP30651UC, HCP36651UC, HCP80641UC, HCP86641UC and HCB50651UC, HCB56651UC. ## Bosch Auto 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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Let the fan run at full speed; it is carrying heat away from the hood. If it comes back, it needs a visit. ### Why did my Bosch hood turn itself on at full speed? Its overheating protection sensed high temperatures and started the fan even though the hood was off. It shuts off again by itself once the temperature drops. ### Can I turn the fan down while a Bosch hood shows Auto? No. The setting is locked at the top until the hood has cooled, then it goes back to the level you chose. ### Is Auto on a Bosch hood a sign of a failing part? Usually not; it is the hood protecting itself from heat below. It becomes a repair question when Auto appears with little or no cooking going on. --- **[Read on the site: Bosch "Auto" on a wall hood: overheating protection has taken over the fan](https://rangehooderepair.center/error-codes/bosch-auto/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**