Bosch Washer Error Code E23: Meaning and Fix
Also shown as: Aquastop
Reading the washer display
On a washer the code appears on the digital display or as a pattern of flashing cycle lights. Note it exactly, including any dashes or sub-codes, then unplug the washer for five minutes and run a short drain cycle to see whether it returns. Bosch shows the code with a leading E and a number on both dishwashers and washers.
Bosch (part of BSH Home Appliances) uses E-numbered codes on dishwashers and washers. Its dishwashers share control platforms with Thermador and Gaggenau, so the same fault can appear on those brands. The codes apply to model numbers such as SHPM65Z55N, SHE53T55UC and WAT28400UC; check the label on your unit to confirm yours.
What causes E23
- Water collecting in the base from a leaking door gasket, hose clamp or spray-arm seal
- A float switch or leak sensor stuck or tripped by residual water
- A leaking detergent drawer or door boot
- Overfilling caused by a faulty inlet valve or too much detergent/foam
How to fix it
- Unplug the appliance and shut off the water supply before you investigate.
- Pull the unit out (or remove the toe-kick) and look for wet spots, damp insulation and drips under every hose connection.
- Look at the door boot lower fold for tears and the dispenser housing for cracks.
- Soak up any water in the base pan, then wipe the float and sensor area clean so they move freely.
- Replace worn gaskets, tighten or replace hose clamps and use only the recommended amount of low-sudsing detergent.
- Restore power, run a short test cycle and dry-check the floor and pan afterwards.
Parts you may need
| Part | Part no. | Buy |
|---|---|---|
| Washer Door Seal | 00361127 | Find part |
Part numbers are OEM references; confirm fit by your model number before ordering. Some links are affiliate links; we may earn a commission at no extra cost to you.
Questions
What does error E23 mean on a Bosch washer?
Water detected in the base pan and the aqua-stop system has shut the machine down. Exact behavior can vary by model and software version; confirm against your own manual.
Can I keep using my washer while E23 is showing?
No. Leave the water supply off until the leak is traced, to avoid floor and cabinet damage.
How do I clear E23, and can I fix it myself?
Cancel the program, switch the appliance off and leave it unplugged (or the breaker off) for about five minutes, then restart. The code only stays cleared if the underlying problem is fixed, so work through the steps above. Parts here involve electronics, heating or sealed components, so consider a qualified technician if the basic checks do not clear it.
Other Bosch washer codes
Sources
Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.
Applies to models including WAT28400UC, WAT28402UC, WAW285H1UC, WAP24200UC.