Error code
Bosch Dishwasher Error Code E23 - Meaning, Causes & Fix
Bosch dishwasher E23 usually points to a drain pump fault or blockage. Clean only the user-accessible filter and visible drain route, then stop if E23 returns or the pump sounds strained.
Quick answer
E23: The dishwasher has detected a drain pump fault or blockage.
Code
E23
Bosch Dishwasher
First safe check
Switch the dishwasher off and disconnect power before checking the filter, sump, hose, or any wet area.
When to call an engineer
Call a dishwasher engineer if E23 returns after safe filter and hose checks, the pump is noisy or jammed, water remains in the base, water appears underneath, or diagnosis would require removing panels or dismantling the pump.
Medium severity: check safely and stop if it returns. Disconnect power before checking accessible parts where the appliance guidance says to do so.
Fix time
10-25 minutes
Difficulty
Moderate if access is awkward
The useful first checks are the filter, visible sump, drain hose route, and waste connection.
Expected outcome: A simple blockage may clear after one short drain test; repeat E23 suggests the drain pump path still needs diagnosis.
What does this error code mean?
Bosch dishwasher error code E23 usually points to the drain pump path. The pump may be blocked, clogged, jammed, or not responding as expected.
The safe first checks overlap with other Bosch drainage codes: clean the accessible filter, check the visible sump area, look for a kinked drain hose, and check the sink or waste connection if it is safely accessible. Do not dismantle the drain pump or remove panels.
If the issue looks like a general not-draining fault, compare Bosch dishwasher E24. If the pump-cover area is specifically involved, compare Bosch dishwasher E25. If water is appearing underneath, compare Bosch dishwasher E15.
Symptoms users may notice
- Water may remain in the bottom of the dishwasher.
- The pump may hum, strain, or run without clearing water.
- The programme may stop around a drain stage.
- E23 may appear with similar drainage symptoms to E24 or E25.
What users often notice
- E23 often appears when the dishwasher tries to empty and cannot move water normally.
- Users may notice standing water, a strained pump sound, or the code returning after a reset.
Why is this happening?
- Blocked or clogged drain pump path
- Food debris, labels, seeds, or glass fragments near the accessible sump area
- Kinked or restricted drain hose
- Blocked sink waste, standpipe, or drain outlet connection
- Drain pump fault that needs internal diagnosis
What this usually points to
E23 usually points to the dishwasher drain path, including the filter, sump, drain hose, waste connection, drain pump, and pump-control response.
How to fix this safely
- Switch the dishwasher off and disconnect power before checking the filter, sump, hose, or any wet area.
- Remove and clean the accessible filter, then check the visible sump area for loose debris without reaching blindly.
- Check the visible drain hose for kinks, trapped sections, or a poor route into the waste connection.
- Check the sink spigot, standpipe, or waste connection if the dishwasher drains into it and it is safely accessible.
- Run one short drain or rinse test only after everything is refitted and dry; stop if E23 returns, water remains, or the pump sounds noisy.
Can I fix this myself?
MaybeYou can clean the accessible filter and check the visible drain route. Stop if the pump sounds jammed, the code returns, or the next step would require opening the appliance.
Safety boundary: Disconnect power before checks. Do not dismantle the pump, remove panels, test wiring, or reach blindly into the sump where sharp debris may be hidden.
What not to do
- Do not keep restarting a dishwasher that still contains standing water.
- Do not reach blindly into the sump where broken glass may be hidden.
- Do not dismantle the pump or remove panels to chase the blockage.
- Do not ignore leak warnings if E15 or E30 appears as well.
Common misdiagnoses
- E23 can be mistaken for a simple reset issue when a drain restriction or pump-path fault remains.
- A clean filter does not rule out a kinked hose, blocked waste connection, or pump-path issue.
Reset steps
- Refit the filter and any user-accessible cover exactly as the manual describes.
- Reconnect power only when the area is dry and there is no visible leak.
- Run one short drain or rinse programme to confirm whether water clears.
- Stop if E23 returns, the pump sounds strained, water remains in the dishwasher, or water appears underneath.
Intermittent vs persistent faults
A one-off E23 may clear after removing a visible blockage. Repeated E23 should be treated as a persistent drain or pump-path problem.
When to call an engineer
Call a dishwasher engineer if E23 returns after safe filter and hose checks, the pump is noisy or jammed, water remains in the base, water appears underneath, or diagnosis would require removing panels or dismantling the pump.
Safety warning
Disconnect the dishwasher from power before checking accessible filters, sump areas, hoses, or wet areas. Do not dismantle the pump, remove panels, or work on internal electrical, pump, heater, valve, or control parts yourself.
Useful hub links
Related drainage fault codes
Bosch Dishwasher Error Code E15
The dishwasher anti-flood system has been triggered
Bosch Dishwasher Error Code E30
the dishwasher has detected a water safety, leak, or overfill-style problem.
Bosch Dishwasher E24 Error - Drainage Problem and Safe Checks
The dishwasher is not draining properly.
Bosch Dishwasher E25 Error - Drain Pump or Blockage Warning
The drain pump area may be blocked or unable to move water properly.
Relevant guide
Frequently asked questions
What does Bosch dishwasher E23 mean?+
Bosch dishwasher E23 usually means the dishwasher has detected a drain pump fault or blockage.
How do I fix Bosch dishwasher E23 safely?+
Disconnect power, clean the accessible filter, check the visible sump and drain hose, and check the waste connection. Stop if E23 returns or the pump sounds strained.
Is Bosch E23 the same as E24 or E25?+
They are related drain faults. E23 usually points more directly to the drain pump path, while E24 is a broader not-draining warning and E25 often points to the pump-cover area.
Model variation note
Bosch dishwasher access to the pump-cover area varies by model. Follow the model manual and keep checks to user-accessible parts.