Bosch · Dishwasher
Bosch Dishwasher E01 Error Code
Heat pump motor circuit fault at control board
What this error means
E01 means a heat pump motor circuit fault at the main control board—the drive that circulates refrigerant in CrystalDry heat-pump dishwashers is not responding. The dishwasher may not start or may stop during dry phase with E01.
How E01 is detected
When E01 appears on a Bosch dishwasher, the control board has confirmed that water did not leave the machine within the programmed drain window. On Bosch SHPM88Z75N, Bosch SHX878ZD5N, 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 E01 calls are resolved without parts: reset breaker thirty seconds per bosch official procedure. 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 E01 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
- Heat pump motor driver failure on the power module
- Loose connector at the heat pump assembly after shipping
- Power surge damaging the motor circuit on the board
- Heat pump motor seized from lack of maintenance descaling
Step-by-step fixes
- 1Reset breaker thirty seconds per Bosch official procedure
- 2Ensure the dishwasher is on a dedicated 15A or 20A circuit without extension cords
- 3Run one empty Normal cycle after reset before loading dishes
- 4Stop using Sanitize/CrystalDry until E01 clears on a basic cycle
When to call a technician
E01 after reset requires Bosch-certified heat pump or power module service—boards may need programming.
Affected models
- Bosch SHPM88Z75N
- Bosch SHX878ZD5N
- Bosch SHEM78WH5N
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dishwashers to prevent E01 from lint and food debris buildup.
- Record when E01 appears in the cycle and whether it clears after a 60-second power reset on your Bosch dishwasher—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for E01; Bosch uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting E01; reversed plugs on pumps and valves cause immediate repeat faults.