Bosch · Refrigerator
Bosch Refrigerator E8 Error Code
Ice maker or ice compartment sensor fault
What this error means
E8 indicates an ice maker or ice compartment temperature sensor fault—the sensor that tells the board when to harvest ice or protect the ice box from warm air failed. Ice production stops while E8 is active on models with factory ice makers.
How E8 is detected
When E8 appears on a Bosch refrigerator, the control board has confirmed that water did not leave the machine within the programmed drain window. On Bosch B36CL80ENS, Bosch B36CT80SNB, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most E8 calls are resolved without parts: confirm the ice maker switch is on and the freezer is set to 0°f or lower. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If E8 returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Ice maker thermistor disconnected during bucket removal
- Frozen fill tube causing sensor misread
- Failed ice maker control module sensor input
- Door left ajar letting humid air confuse the ice box sensor
Step-by-step fixes
- 1Confirm the ice maker switch is ON and the freezer is set to 0°F or lower
- 2Remove the ice bucket and reinstall until it seats on the drive auger
- 3Reset breaker thirty seconds and wait twenty-four hours for a harvest attempt
- 4Check the freezer door seal along the ice dispenser area
When to call a technician
E8 after twenty-four hours with no harvest attempt requires ice maker module or sensor service.
Affected models
- Bosch B36CL80ENS
- Bosch B36CT80SNB
- Bosch B36CD50SNS
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use refrigerators to prevent E8 from lint and food debris buildup.
- Record when E8 appears in the cycle and whether it clears after a 60-second power reset on your Bosch refrigerator—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for E8; Bosch uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting E8; reversed plugs on pumps and valves cause immediate repeat faults.