Bosch · Dishwasher Serious

E01 — Control board fault

Per Bosch's official US error-code page, E01 means there is a heat pump motor circuit fault at the main control board. Bosch's first recommended step is to reset power at the breaker for 30 seconds.

Keep using it?
Limited use only
DIY difficulty
Hard
Typical cost
$150-300
Verified against
bosch-home.com ↗

The fix

Main control board

Heater relay / control board fault

$150-300 hard difficulty 60 min Tools: screwdriver, nut driver, multimeter

Diagnose first: Control board cannot verify heater circuit; often the relay on the board itself has failed.

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Didn't resolve it? Next suspect: Heating element ($50-120)

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How to fix it

  1. Hard reset: switch off at the breaker for 5 minutes, then restore power.
  2. Open the door top and inspect the control module area for moisture or staining.
  3. Re-seat the ribbon cable between the user interface and main PCB.
  4. Run a Rinse-only program to see if the fault returns.
  5. If E01 persists, the main control module typically requires replacement (Bosch part number specific to model).

Why it happens

Typical signs: Cycle stops mid-program · Dishwasher resets itself · Display freezes or blanks · Buttons unresponsive

  • Control module failure PCB internal fault, often after power surge or moisture intrusion under the lid.
  • Moisture in control housing Water from a leaking door seal reached the upper control board.
  • Power supply problem Unstable house voltage tripping the brownout watchdog.
  • Wiring harness fault Loose or corroded connector between PCB and user interface.

More Bosch dishwasher codes

E02 E02 — Heating element / NTC sensor fault E03 E03 — Water not heating E04 E04 — Water flow / flow meter fault E05 E05 — Overfill / float switch tripped E06 E06 — Door-Closure or Aqua (Turbidity) Sensor Fault E07 E07 — Drying fan fault

All Bosch codes → All dishwasher codes →

Frequently asked questions

What does the E01 code mean on a Bosch dishwasher?

Per Bosch's official US error-code page, E01 means there is a heat pump motor circuit fault at the main control board. Bosch's first recommended step is to reset power at the breaker for 30 seconds.

What causes the E01 code on a Bosch dishwasher?

Control module failure: PCB internal fault, often after power surge or moisture intrusion under the lid. Moisture in control housing: Water from a leaking door seal reached the upper control board. Power supply problem: Unstable house voltage tripping the brownout watchdog.

Is it safe to keep using a Bosch dishwasher with a E01 error?

Limited use only. This is rated a serious-severity fault.

How do I fix E01 on a Bosch dishwasher?

Hard reset: switch off at the breaker for 5 minutes, then restore power. Open the door top and inspect the control module area for moisture or staining. Re-seat the ribbon cable between the user interface and main PCB.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: bosch-home.com.