4 LEDs Flashing is connected with drainage restriction involving the pump area, hose, or external drain path. Use the exact model number and the visible symptoms before deciding what the dishwasher needs.
4 LEDs Flashing is connected with drainage restriction involving the pump area, hose, or external drain path. Use the exact model number and the visible symptoms before deciding what the dishwasher needs.
Model compatibility: Bosch reuses codes across series and model years, so Bosch Dishwasher 4 LEDs Flashing Error Code may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
The verified Bosch meaning for 4 LEDs Flashing is drainage restriction involving the pump area, hose, or external drain path. Treat that wording as the technical anchor for this page. The displayed code narrows the system that needs attention, but the complete E-Nr and observed behavior are still important before a repair decision is made.
Signs
Symptoms you may notice
water may remain in the tub
draining can sound slower or different
the program may stop before completion
the code can return at the drain stage
Why it happens
Possible causes
blocked filter or pump area
kinked or obstructed drain hose
blocked air gap or disposal connection
drain-pump or sensing fault
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
Turn the dishwasher off before user-accessible drain maintenance.
Clean the removable filter if the model manual identifies it as a user-maintenance part.
Check the accessible pump-cover area only as described in the owner instructions.
Inspect the external drain hose for a sharp kink and check the air gap or disposal connection for an obvious blockage.
Important safety warning. Stop use if water is leaking onto the floor or reaching electrical parts.
Get help
When to call a technician
If the accessible drain path is clear and the code returns, the pump, sensing, wiring, installation, or internal drain path needs diagnosis. When requesting service, include the complete Bosch model/E-Nr. Similar-looking dishwashers can use different controls, pumps, drying systems, and diagnostic logic.
Seeing this code on your Bosch appliance?
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