Bosch · Washing Machine
Bosch Washing Machine E29 Error Code
Load too unbalanced to reach spin speed
What this error means
E29 means unbalanced load—the drum speed sensor detected excessive wobble before reaching final spin RPM. Bosch aborts high-speed spin rather than walk the machine across the floor or stress suspension components.
How E29 is detected
When E29 appears on a Bosch washing machine, the control board has confirmed that water did not leave the machine within the programmed drain window. On Bosch WAW285H1UC, Bosch WAT28400UC, 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 E29 calls are resolved without parts: pause, open the door, and spread items around the full drum perimeter. 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 E29 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
- Single heavy item such as a bath mat clumped on one side
- Mixed load with dense jeans and light shirts unevenly packed
- Washer not level—front feet uneven or lock nuts loose
- Worn shock absorbers allowing excessive tub movement
Step-by-step fixes
- 1Pause, open the door, and spread items around the full drum perimeter
- 2Add one or two towels when washing a lone heavy piece
- 3Place a level on the washer top and adjust front feet until centered, then tighten lock nuts
- 4Retry Spin at 800 RPM before running a full wash cycle
When to call a technician
E29 on balanced full loads after leveling suggests worn suspension rods or shock absorbers inside the tub assembly.
Affected models
- Bosch WAW285H1UC
- Bosch WAT28400UC
- Bosch WGA12400UC
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use washing machines to prevent E29 from lint and food debris buildup.
- Record when E29 appears in the cycle and whether it clears after a 60-second power reset on your Bosch washing machine—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for E29; Bosch uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting E29; reversed plugs on pumps and valves cause immediate repeat faults.