Modern Bosch washing machines are equipped with diagnostic systems that display error codes to alert you to faults. Recognizing those codes and knowing how to respond can save you time, money, and frustration. In this article, we review the most common Bosch error codes, explain their causes, suggest troubleshooting steps, and offer a full table of codes and remedies. At the end, you’ll also find a call-to-action for repair help.
Why Bosch Implements Error Codes
Bosch uses error codes (e.g. “E16,” “F23”) or LED blink signals to flag issues like:
- Door not locked or not closing
- Inadequate water supply or inlet problems
- Drainage or pump blockages
- Faults in sensors or heating elements
- Motor or control module failures
These codes serve three main purposes:
- Diagnostic precision
- Early warning
- Operational safety
Common Bosch Error Codes & Their Remedies
| Error Code(s) | Symptom / Meaning | Possible Causes | Suggested Fixes / Checks |
|---|---|---|---|
| E16 / F16 | Door open / cannot lock | Door not fully closed, door seal obstruction, defective door latch | Check for obstructions, ensure door closes firmly. Replace door lock if needed. |
| E17 / F17 | Water fill / inlet error | Tap closed, low pressure, blocked filter, faulty inlet valve | Open tap, clean filters, inspect hose. Replace inlet valve if faulty. |
| E18 / F18 | Drain / pump timeout | Pump blocked, hose clogged, foreign object | Clean pump filter, inspect drain hose, remove blockages. |
| E19 / F19 | Heating time exceeded | Heating element failure, scale, sensor fault | Descale washer, test heating element and temperature sensor. |
| E20 / F20 | Unexpected heating | Electrical fault, heating circuit short | Reset machine, inspect heating circuitry. |
| E21 / F21 | Low motor rotation / motor error | Motor blockage, worn brushes, control board fault | Check for obstructions, inspect brushes and motor electronics. |
| E23 / F23 | Water leak / AquaStop triggered | Water in base tray, hose leak, faulty sealing | Turn off water, check hoses and seals, inspect base tray. |
| E25 / F25 | Turbidity sensor error | Faulty water clarity sensor | Replace or test sensor and connections. |
| E26 / F26 | Pressure sensor fault | Defective switch, clogged tube | Clean sensor tube, replace if necessary. |
| E28 / F28 | Flow meter fault | Sensor or wiring fault | Replace or repair flow meter. |
| E32 / F32 | Load unbalanced | Uneven laundry load | Redistribute clothes and restart cycle. |
| E36 | AquaStop failure | Internal leak system fault | Requires technician inspection. |
| E56 | Communication error | Control board or wiring fault | Power cycle machine, inspect main board. |
| E60–E69 | Heating circuit faults | Sensor or heater failure | Replace faulty heating components. |
| E90–E92 | Software/control board error | PCB failure | May require board replacement. |
| CL / CHILD | Child lock active | Not a fault | Hold Start/Pause for several seconds to unlock. |
| NO, END flashing | Fill or drain issue / end of cycle | Inlet or drain problem | Check hose, water supply, pump, or allow cycle to complete. |
Basic Troubleshooting Checklist
- Unplug and Reset – Wait a few minutes, then restart.
- Check Inlet – Tap must be open, filters clean, hoses clear.
- Drain Issues – Clean pump, ensure no kinks or blocks.
- Drum Movement – Rotate manually to test freedom.
- Test Sensors – Use multimeter if skilled.
- Replace Faulty Parts – Do only if you’re confident.
- Contact a Technician – When in doubt or error persists.
When Professional Help Is Needed
If your Bosch machine displays recurring or serious error codes—like those linked to leaks, motor faults, or electronics—it’s best to have a technician inspect and fix the problem. Many issues, especially internal ones like PCB failures, can’t be safely handled at home.
If you couldn’t fix the issue yourself, contact us and we will fix it. We service Bosch washing machines quickly and professionally.