Bosch E01: Control-Board Fault, Meaning Varies
High severity
E01 is a control-board-level fault whose exact meaning depends on your specific Bosch model — most often the heating circuit, sometimes the pump circuit or the drying motor.
The display simply shows E01 with no further detail, and depending on the model that can show up as dishes coming out cold and wet, a cycle stalling partway through, or — on 800 Series and Benchmark units with Zeolith drying — dishes that wash fine but never dry. It's one of the more frustrating Bosch codes precisely because it isn't a single, fixed fault.
Applies to: Bosch dishwashers with electronic displays; the exact fault this points to varies by model (heating circuit fault on most series, pump control circuit fault on some, or heat-pump dryer motor fault specifically on 800 Series/Benchmark models with a Zeolith drying system).
What it means
A control-board-level fault has been detected in either the heating circuit, the pump control circuit, or (on Zeolith dryer models) the heat-pump drying motor, depending on your specific model.
Bosch reused the E01 label across more than one fault family instead of giving each its own code, so two owners with E01 on their display can genuinely be looking at two different underlying problems — this is the one code on this site where checking your model's own manual matters more than the general advice below.
Common causes
Depending on which system E01 is flagging on your particular model, the underlying issue is usually one of the following:
- Heating circuit failing to bring water up to the programmed temperature in the expected time
- Pump control circuit fault reported by the main control board
- On 800 Series/Benchmark units with the Zeolith drying system, a stalled or failed heat-pump drying motor
- General control board electronics fault
What you can check yourself
Because the meaning varies by model, the safe first steps are the same regardless of which fault is actually behind it:
- Cut power to the dishwasher at the breaker for 5-10 minutes to force a full reset
- Restart a normal cycle and see whether the code returns immediately or only intermittently
- Check your specific model's use-and-care manual, since Bosch documents E01 differently across product lines
Call a professional when
Because E01 can mean different things depending on model, and a recurring E01 usually points to a component on the control board or heat-pump drying assembly, book a technician who can pull the exact fault history for your model rather than guessing at parts.
Related
- Bosch dishwasher codes hub
- Bosch E09 — heating element open circuit
- Bosch E27 — low supply voltage shutdown
- Dishwasher Blinking Lights With No Error Code Shown