Washing Machine

E:12-00 Error Code Bosch WDU28560 washer dryer

July 31, 2026
Customer Question

Hi. I decided to write to you as a final attempt to resolve my washer dryer issue, based on your very nice and informative youtube videos. What happens is that after switching the machine on, after about 2 seconds it locks, the screen displays reduced options, and the digital dial refuses to turn producing a beep. No icon is displayed on the screen. Within this 2sec window it gives me, I pressed the lowest symbol on the left of the screen (a snowflake) for 5 seconds, and the screen displayed the code E:12-00. After many attempts and resets (unplugging and pressing the on button for about 10seconds), it magically worked once (complete wash cycle) but then all the same. Thank you for your time!

Paul
Paul Repair Expert

Hi George. You did not provide a telephone number for me to assist you, so I could only look up the basic information. I hope this helps you in some way. After checking the manuals, I found an error. E 12, followed by 00, usually means there is a problem with the drying unit. 

The E12-00 error code on your Bosch WDU28560 washer dryer indicates a fault within the drying circuit. This is one of the more common error codes you'll encounter with this model, and understanding what it means can help you decide whether a repair is needed or if a simple reset might resolve the issue.

this video may give you an understanding how the whole system works. It may be on a different machine, but it is a video I made a while back. 

What the E12-00 Error Code Means

After checking the manuals, I found an error. E 12, followed by 00, usually means there is a problem with the drying unit. Specifically, this code points to a malfunction in the drying heater circuit or the sensor that monitors drying temperature. The "00" suffix indicates this is the primary occurrence of the fault rather than a secondary or recurring issue.

Possible Common Causes of the E12-00 Error

  • Faulty heating element: The drying heater may have failed or developed an electrical fault.
  • Temperature sensor malfunction: The thermistor or temperature probe in the drying chamber may be defective or disconnected.
  • Wiring or connector issues: Loose, corroded, or damaged connections between the heater and control board can trigger this code.
  • Control board fault: In rare cases, the main PCB may have failed to properly regulate the drying circuit.
  • Blocked airflow: A severely restricted airflow  can cause the dryer to overheat and trigger a safety shutdown.

Based on the "WDU28560.pdf" document you provided, the display code E:12-00 corresponds to the 4-digit error code 1200.

Here are all the relevant details and troubleshooting steps outlined in the manual for this specific error:

Error Description

  • This code indicates a drying unit (DU) general or undetermined error.

Possible Causes

The document identifies three potential reasons for this error to occur:

  • Cause 1: The switch-off device for the heater tunnel (Klixon) has been triggered due to an over-temperature event.

  • Cause 2: The wiring harness connected to the drying unit (DU) is damaged.

  • Cause 3: The drying unit (DU) itself is damaged.

Checks and Remedial Actions

To resolve the issue, the recommended actions correspond to the causes above:

  • Action 1: Check the heater tunnel for any possible blockages, and then manually reset the Klixon switch.

  • Action 2: Inspect the drying unit (DU) wiring harness for any signs of damage or disconnection.

  • Action 3: If the unit is confirmed to be irreparably damaged, change the drying unit (DU).

Additional Information

  • Related Errors: This error is directly related to the 2-digit error code 150, which shares the exact same diagnostic and remedial steps.

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