Bosch HCG56651UC Hood: Filter Alerts & Troubleshooting

The Bosch HCG56651UC is a U.S.-market Benchmark 36-inch wall-mounted range hood. Bosch lists washable grease filters, two halogen lights, exhaust operation or accessory-based recirculation, and the matching HCG56651UC manual explains filter saturation messages and the Auto overheat-protection notice. Its use-and-care guide covers fan settings, grease-filter cleaning, optional charcoal-filter replacement and an automatic heat-protection message. These are operating or maintenance indications, not a confirmed set of electronic fault codes. Before taking action, identify the exact message, check whether the hood is ducted or recirculating, and note what the fan is doing. Stop using the hood for visible sparks, smoke unrelated to cooking, electrical damage or persistent abnormal motor behavior, and request professional service.

Filter and display messages explained

• Clean grease filter: the model-applicable hood manual describes a reminder after roughly 30 hours of fan operation. Clean the washable metal filters using the instructions, even if they do not look especially dirty.
• Replace charcoal filter: a reminder appears after about 120 fan-operating hours when the optional activated-carbon system is used. This is not a reason to buy a charcoal filter for a ducted installation that does not use one.
• Auto: automatic overheating protection can raise or maintain the fan setting temporarily when the hood senses high heat. Wait for the system to cool; do not bypass it.
• End / Able / None: the manual uses these for timer completion or air-mode display configuration. They do not identify an internal motor or circuit-board failure.

How to clear the maintenance reminder

After cleaning and refitting the grease filters, press and hold + for five seconds to clear their saturation reminder. After replacing an installed charcoal filter, press and hold − for five seconds for the charcoal reminder. Do not clear a warning instead of doing the required filter maintenance. For the appropriate circulating-air display setting, follow the exact-model control manual and confirm the installed venting arrangement.

Weak extraction or fan not starting

• Check the +/− fan setting before assuming the motor has stopped; inspect only accessible, cooled filters after disconnecting power.
• If the installation is recirculating, verify that the optional charcoal filter is present and maintained. Do not use the charcoal reminder to diagnose a ducted-only installation.
• Turn the hood off and disconnect power before opening or cleaning accessible filter areas. Bosch says the metal grease filters may be washed by hand or in a dishwasher; let them dry before reinstalling.
• Check that the air path is not visibly blocked at safe, user-accessible points. Do not remove fixed ductwork, cut into wiring, work at height unsafely or run the hood without the required grease filters.
• If the display shows Auto and the motor will not reduce its setting, allow safe cooling and monitor the condition. If the fan repeatedly behaves abnormally, consult a qualified technician.

Lights, timers and ordinary operation

Use the Light button to switch illumination according to the manual. It can operate independently from the extraction fan. The Timer button manages delayed completion, and “End” is an operating notice, not a fault number. Replace lamps only by following the model manual after power is disconnected and the assembly has cooled; never reach a live socket.

Maintenance safety and service threshold

Bosch warns about grease-fire risk. Clean metal grease filters at least every two months and never operate without them. Avoid aggressive cleaners and keep electrical controls dry. Contact Bosch or an authorized technician if the fan does not operate after ordinary controls and external power are confirmed, if overheating protection appears repeatedly during normal cooking, or if there are unusual sounds, smoke, heat damage or a tripping breaker.

Exact model, manuals and references

HCG56651UC: 36-inch Benchmark stainless-steel wall hood. The hood can exhaust outside, or recirculate using separately available charcoal filtration where installed. The manufacturer lists two halogen lights and washable metal grease filters. Verify the rating-plate E-Nr /XX suffix before ordering filters or service parts.

• Bosch HCG56651UC product information
• Bosch hood use-and-care manual (9001126827_B.pdf)
• Bosch service and exact E-Nr reference

Evidence note: Filter reminders, timer notices and Auto are covered by the matching manufacturer manual. They are not being claimed as model-specific electronic fault codes. No unsupported numbered hood fault codes are included.