Bosch Dishwasher E04 — Water flow / flow meter fault
Bosch Dishwasher · Error code E04
What E04 Means
Flow meter is not registering the expected water volume during fill. Either too little flow detected or the meter is faulty.
Most Likely Fix
Water flow sensor / flow meter fault
Tools: screwdriver, pliers, towel
Diagnose first: Control board not seeing expected pulses from the flow meter; sometimes a debris-jammed impeller.
Find this part on Amazon →Symptoms
- Cycle pauses early in fill
- Display shows E04
- Reduced spray pressure
Common Causes
Screen at the inlet valve is blocked with debris from supply line.
House pressure below the 20 psi Bosch minimum.
Hall-effect impeller in the AquaStop or sump is stuck or failed.
Hose pinched behind the unit reducing fill rate.
How to Fix It
- Shut off the water and disconnect the inlet hose at the dishwasher.
- Clean the inlet screen with a brush and rinse.
- Verify hose is not kinked behind the unit during reinstall.
- Check house water pressure (should be 20-120 psi).
- If flow meter is faulty, replace the inlet hose assembly (AquaStop) or sump flow meter per model.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Bosch Dishwasher Codes
Verified against manufacturer documentation: bosch-home.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.