Error code
Bosch Washing Machine E30 Error - Overflow or Leak Warning
Bosch washing machine E30 usually means leak or overflow protection has been triggered. Check for water underneath, signs of overfilling, and safely accessible hose or seal issues first; stop using the washer if E30 returns or any leak is visible.
Quick answer
E30: what does it mean and how to fix
What does it mean?
Overflow or leak protection has been triggered
How to fix first
Turn the machine off and unplug it from the mains.
Why is this happening?
Overflowing because the fill system is letting in too much water
When should I call an engineer?
Call an engineer if E30 returns after one safe check, water is visible underneath, the machine overfills, or the hoses and door seal look normal but the warning persists.
What does this error code mean?
Bosch washing machine error code E30 usually means the appliance has detected too much water, an unexpected water level, or possible leakage. In plain terms, Bosch E30 is usually an overflow or leak warning, so the washer stops to protect itself.
Check first for water around or underneath the machine, signs that the drum has overfilled, or hose issues that may be letting water escape. If the washer is not taking in enough water instead, compare the fault with the Bosch E29 water supply fault, while a drain-time problem is closer to Bosch E18. If the symptom is the drum struggling to turn rather than a water-level warning, compare it with Bosch F21 motor and drum movement faults.
This code points to overflow and leak protection, including the water level sensing path, hose connections, door seal areas, and internal leak detection zones.
Symptoms users may notice
- The washer may stop mid-cycle and refuse to continue.
- Water may be visible around or underneath the appliance.
- The drum may look too full or the machine may try to protect itself by stopping.
What users often notice
- Users often describe Bosch E30 as a leak warning, a sudden stop with water inside, or the machine acting as if it has overfilled.
Why is this happening?
- Overflowing because the fill system is letting in too much water
- Leak inside or beneath the appliance
- Sensor reading an abnormal water level
- Hose or seal problem allowing water to escape
What this usually points to
This code points to overflow and leak protection, including the water level sensing path, hose connections, door seal areas, and internal leak detection zones.
How to fix this safely
- Turn the machine off and unplug it from the mains.
- Do not keep restarting the appliance if there is visible water leakage.
- Check the surrounding floor area, door seal, and hose connections if they are safely accessible.
- Only try one short restart after the area is dry and there is no obvious leak; if the issue looks more like poor filling than overfilling, compare the symptoms with the Bosch washing machine E29 fill issue.
Can I fix this myself?
MaybeYou can safely check for visible leaks, obvious overfilling, and accessible hose issues. Persistent E30 usually needs further diagnosis because leak or water-level protection has been triggered.
Safety boundary: Stop immediately if water is underneath the machine, the drum keeps filling, or you would need to remove panels or work near wiring.
What not to do
- Do not keep restarting the washer if there is visible water or the drum keeps filling.
- Do not ignore water underneath the appliance, even if the code clears once.
Common misdiagnoses
- Bosch E30 can be mistaken for a simple reset issue, but it often points to leak or overflow protection rather than a one-off interruption.
Reset steps
- Only restart the machine once the cause of the water issue has been checked.
- Stop using the appliance if the code returns or leakage is visible.
- Do not keep retrying if the washer overfills, leaks, or the water level still looks wrong.
Intermittent vs persistent faults
A one-off E30 after unusual foaming or a temporary water issue may clear after safe checks, but repeated E30 should be treated as a persistent leak or overflow risk.
When to call an engineer
Call an engineer if E30 returns after one safe check, water is visible underneath, the machine overfills, or the hoses and door seal look normal but the warning persists.
Safety warning
Disconnect the appliance from the mains and avoid using it if water may be reaching electrical parts.
Useful hub links
Related leak and overflow fault codes
Bosch Washing Machine F21 Error - Drum or Motor Fault
Motor drive or drum movement issue
Bosch Washing Machine E29 Error - Not Filling Properly and How to Fix It
The washer is not filling with water properly.
Bosch Washing Machine Error Code E23
Overflow or leak protection has been triggered
Bosch Washing Machine Error Code F23
Overflow or leak protection has been triggered
After resolving this fault, use the right wash setting to help prevent repeat issues.
Relevant guide
Frequently asked questions
Can I keep using a Bosch washing machine with E30 showing?+
No. It is best not to keep using the machine while E30 is showing, because the fault can involve overfilling, leaking, or water reaching protected areas.
Will resetting clear E30 for good?+
A reset may clear a temporary interruption, but if E30 comes back after the first safe checks, the underlying overflow, leak, or water-level fault still needs attention.
What does Bosch E30 mean?+
Bosch E30 usually means the washer has triggered overflow or leak protection. Check first for water underneath, overfilling, or a hose problem.
Is Bosch E30 a leak warning?+
Often, yes. Bosch E30 commonly appears when the machine detects water where it should not be or thinks the water level is unsafe.