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bosch washing machine error code e04

Simple Steps To Fix Bosch Washer Error Code E04


If the E04 error code shows up on the screen of your Bosch washer, keep reading our article. This warning generally means that the tank has too much foam. However, there are situations when the problem is unrelated to it. Together with Jacob Dillard, an engineer at Appliance Repair Expert, we will look into this problem in more detail.

Step 1: Reduce The Amount Of Foam

Check to see whether the tub has any water in it. This is a typical problem that occurs when there are too many suds. It’s caused by improper laundry detergent, which isn’t made for high-efficiency washing machines. Some Bosch washer error codes and particularly this one, can be erased by resetting the machine and adjusting your detergent use.

Next time you use the Bosch washing machine, use less detergent or the right detergent for the wash load. Bosch suggests washing detergent with the word “HE” prominently displayed on the label. To wash the clothing, front loaders and other high-efficiency machines need less soap. Laundry detergent manufacturers create “HE” soap, which produces less foam when stirred, for use in these machines.

About HE Laundry Detergent

Step 2: Inspect The Drain Pump

Turn off and disconnect the washer to be extra safe.

The drain pump can be reached through the circular access panel on the bottom. This panel detaches from the rest of the panel. It has three ears that fit into three openings on the front of the machine. Once the ears are in the cutout, the panel turns counterclockwise to secure the ears behind the metal.

circular access panel on washer

If the panel were a clock face, it would have a little hole around the 5 o’clock position. To gain leverage, put a nail in the hole. While rotating the panel clockwise to transfer the hole to the 6 o’clock position, gently push on the panel with your other hand.

Be careful when removing the cover. The hole’s margins might be rough and jagged. You may use tape or gloves to cover the edge while working. The more daring can trim rough edges with a file or grinder.

Bosch Washer Drain Pump
Bosch Washer Drain Pump

Step 3: Removing The Sump Cover

The drain pump sump is covered with a black plastic cover. To prevent leakage, a gasket is fitted under the plastic threads. Be careful when accessing the sump as the edges of the opening may be sharp. You can use a file/sander, tape or gloves to smooth the edges. To collect some of the water, place as many towels as possible under the lid and under the machine. You can now unscrew the lid completely. Check the drain pump for obstructions with a flashlight. Remove any debris.

Sump Cover

DO NOT REMOVE THE COVER IF THERE IS WATER IN THE DRUMS. Just a quarter turn can break the seal.


  1. The E04 error code on Bosch washers typically indicates excess suds or foam in the tub. This is often caused by using too much or the wrong type of detergent.
  2. To fix this, first, reset the machine and reduce the amount of detergent used. Specifically, use a detergent marked as “HE” (high-efficiency) and follow the detergent guidelines for front-loading or high-efficiency washers requiring less soap.
  3. If reducing detergent does not resolve the issue, the problem may be with the drain pump. Access the pump by removing the circular access panel on the bottom front of the machine. Inspect the pump and drain hoses for obstructions. Remove any debris found.
  4. Take care when removing access panels, as the edges may be sharp. Use tape, gloves or files to smooth sharp edges to prevent injury. Also, have towels ready to soak up any water leakage.
  5. Do not attempt to remove the drain pump cover if water remains in the drum, as this can break the water-tight seal and lead to flooding.

In general, the E04 code, according to Jacob Dillard, most often indicates excessive suspended solids caused by improper detergent use. Checking the drain pump and removing obstructions will help resolve the problem in most cases. However, if you are unable to do so and the problem persists, you can schedule an appointment with Appliance Repair Expert.

Author: Jacob Dillard
My name is Jacob Dillard, and I am the author of articles at Appliance Repair Expert. Since childhood, I have been fascinated by technology and spent much time reading different books and trying to repair my first CD player. Then, I graduated from the University of Toronto with a degree in Applied Science and Engineering. In a year, I got my first job as a technician at an appliance repair company. After years of practice and working with professionals, I decided it was time to share my knowledge and experience here at Appliance Repair Expert. I want to help you understand everything related to appliance repair, maintenance and installation in the simplest way possible. It will be fun, believe me!

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bosch washing machine error code e04

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