Does this guide apply to your appliance?

Match the brand, device type and complete display code. The same code can mean something different on another product family or market; a series name does not confirm every model in that series.

Model and family references in this record:

Bosch 300 SeriesBosch 500 SeriesBosch 800 SeriesBosch Serie 2Bosch Serie 4Bosch Serie 6Bosch Serie 8

Likely causes

  • Household mains voltage is too low (brownout or grid fluctuation)
  • Circuit overload caused by multiple high-draw appliances running simultaneously
  • Faulty, loose, or damaged wall outlet or electrical connection
  • Use of an extension cord or multiple-socket adapter
  • Defective internal power module or supply cord connection

What to try

Perform a Hard Power Reset

Easy
  1. Turn off the dishwasher using the power button.
  2. Locate your home circuit breaker panel and switch off the dedicated breaker for the dishwasher (or unplug the appliance if the outlet is safely accessible).
  3. Wait at least 30 to 60 seconds to allow all residual power in the control module to dissipate.
  4. Turn the circuit breaker back on (or plug the appliance back in).
  5. Power on the dishwasher and start a short wash or rinse cycle to check if the error clears.

Source for this check: www.bosch-home.com

Check Electrical Circuit Conditions and Call an Electrician

Easy
  1. Verify that the dishwasher is connected directly to a dedicated wall socket and not running through an extension lead or multi-plug adapter.
  2. Turn off other high-power household appliances (such as electric ovens, heaters, or washing machines) to see if localized circuit overloading caused the voltage drop.
  3. Check whether other appliances or lights in the home are dimming or flickering, which indicates broader utility or household supply fluctuations.
  4. Visually inspect the accessible power plug and outlet for discoloration, deformation, or loose contact without touching live terminals.
  5. If the E27 error persists after a reset, stop running the appliance and contact a certified electrician or Bosch service support to evaluate incoming line voltage.

This step is marked caution. Stop if you are not qualified to continue.

Source for this check: www.bosch-home.com

The code returned or the check did not help?

Avoid repeated resets and do not select a replacement part from the code alone. Record the exact code, full model number, when it appeared, and the checks you tried with their results. Share these details with the manufacturer or service technician.

Disconnecting power does not establish that internal components are safe to touch. This guide does not authorize opening electrical components or bypassing safety devices.

Related error codes

Bosch E09Troubleshooting Bosch Dishwasher Error Code E09 (Heating Circuit Failure) Bosch E12Bosch Dishwasher Error Code E12: Limescale Build-up Bosch E14Bosch Dishwasher Error Code E14: Water Inflow/Flow Meter Issue Bosch E15Troubleshooting Bosch Dishwasher Error Code E15 Bosch E16Troubleshooting Bosch Dishwasher Error Code E16 Bosch E17Troubleshooting Bosch Dishwasher Error Code E17

Useful guides

Water left in the dishwasher: safe checks and when to call for serviceA small amount of clean water near the filter may be normal. Water across the tub floor, dirty standing water,... Dishwasher Not Drying? Check Settings, Loading, and Safe MaintenanceUse these owner-safe checks to improve drying, understand what moisture is normal, and know when to call a tec... Dishwasher Filter Care: What You Can Clean—and When to Call a TechnicianLearn how to identify a removable dishwasher filter, clean it safely, and recognize when a pump problem needs...

References