Bosch dishwasher error code

E27

Low power supply

The dishwasher is getting too little voltage from the home's electrical supply.

Also shown on some Bosch models as: E:27 E9001

Try these free fixes first

Unplug the dishwasher before opening any panel.

  1. Switch off the breaker for 30 seconds, then turn it back on.
  2. Make sure the dishwasher is not sharing a circuit with other heavy appliances running at the same time.
  3. Run a short cycle to see if the code clears.

Still showing E27?

If the code keeps coming back, have a licensed electrician check the voltage at the outlet or circuit.

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Questions people ask

What does E27 mean on a Bosch dishwasher?

E27 on a Bosch dishwasher means: low power supply. The dishwasher is getting too little voltage from the home's electrical supply.

How do I fix Bosch dishwasher error E27?

Switch off the breaker for 30 seconds, then turn it back on. Make sure the dishwasher is not sharing a circuit with other heavy appliances running at the same time. Run a short cycle to see if the code clears.

When should I call a repair technician?

If the code keeps coming back, have a licensed electrician check the voltage at the outlet or circuit.

Related dishwasher codes

Source: Bosch official support · Reviewed 2026-10-01