Error Code: E:30 Difficulty: Moderate
Problem: A fault with the turbidity sensor has been detected.
How to Fix E:30 Error (Step-by-Step)
- Begin by completely disconnecting the washer from both the power outlet and the water supply to ensure your safety.
- To access the internal components, you will need to remove the lower front kick panel. This is typically held in place by a few screws or clips.
- Look inside towards the bottom of the washtub, near the sump housing. The turbidity sensor is a small, often translucent component that is inserted into the sump or a connected hose.
- Carefully detach the electrical connector from the sensor. Note the orientation of the plug to make reconnection easier. If there are any small clamps holding a hose to the sensor, use pliers to release them and slide the hose off.
- The sensor is usually held in place by a locking tab or a quarter-turn mechanism. Gently release the tab or twist the sensor to unlock it from its housing and remove it.
- Insert the new turbidity sensor into the housing, ensuring it locks firmly into place. Reconnect the wire harness and any hoses you removed, securing them with their clamps.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
What to Check Next on This Bosch Washer
Bosch Washer Error E:30: Use the code or symbol as the starting clue, then confirm the actual symptom and cycle stage before ordering parts.
- 1. Unplug the washer before opening panels, touching wiring, or reaching near the drain pump, door lock, inlet valve, motor, or control area.
- 2. Verify the simple cause first: check the door latch, load balance, detergent level, inlet water flow, drain filter, hose position, and anything blocking the cycle stage shown by the code or symbol.
- 3. Clean accessible filters and hose screens, remove debris from the pump area when the model design allows it, then reconnect anything that was loose before running another test cycle.
- 4. Test the washer during the same fill, wash, drain, spin, lock, or control step where the warning appeared; measure voltage or resistance only if you are equipped to do that safely.
- 5. Inspect the matching part path instead of guessing: door-lock issues point toward the latch circuit, drain symptoms toward pump or hose restrictions, fill symptoms toward inlet supply, and control-response symptoms toward wiring or board checks.
- 6. Replace a part only after the symptom repeats and the model-specific checks point to that part category. Match any replacement to the complete Bosch model number on the appliance tag.
If the issue returns after these checks, match replacement parts to the complete Bosch washer model number from the appliance tag. The same code can point to different components depending on the exact model and when the failure appears.
Recommended Parts to Check
No exact official OEM part number is listed here because the correct Bosch washer part can vary by complete model number. These are targeted part-category searches, not universal fit claims.
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Bosch washer electronic control boardCommon replacement category: Main control boardFit note: Exact OEM part number varies by full Bosch washer model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for control and communication faults after wiring and connector checks. -
Bosch washer user interface control panelCommon replacement category: User interface / display boardFit note: Exact OEM part number varies by full Bosch washer model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for display, button, selector, or cycle-control faults. -
Bosch washer drain pump assemblyCommon replacement category: Drain pumpFit note: Exact OEM part number varies by full Bosch washer model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for drain, no-spin, and water-removal symptoms after filter and hose checks.
Before ordering: match the part to the complete Bosch washer model number on the appliance tag.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
When It’s Better to Replace Than Repair
Sometimes replacing an appliance makes more financial sense than putting more money into repairs.
Here are a few signs it may be time to shop for a new one:
For repair parts, verify exact fit with the full washer model number before buying; these links are general replacement-appliance shopping options.
- ✓Appliance over 8-10 years old
- ✓Repair cost over 50% of replacement
- ✓Multiple recent breakdowns
- ✓Major component failure
Recommended Replacement Options
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