Bosch dishwasher code E27: house power supply too low

What it means

The voltage reaching the dishwasher is too low.

What to try

Unplug the dishwasher before any step beyond a quick look, and turn the water off before touching hoses.

1. Switch the dishwasher off at its breaker for 30 seconds, then switch it back on.
2. If the code comes back, have an electrician check the incoming voltage.

Call a technician if

Resetting a Bosch dishwasher

Once you’ve fixed the cause, Bosch’s way to cancel the cycle and clear the code is to press and hold Reset (Start on some models) for about 4 seconds. The dishwasher pumps out the water, which takes about a minute; then open the door and press On/Off. For electronic faults, Bosch’s code list says to switch the dishwasher off at its breaker for 30 seconds. If four lights flash and it beeps, Bosch says to press On/Off, switch off the power for at least 2 minutes, then switch it back on; if it happens again, press On/Off, turn off the water, unplug it and call Bosch.

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