Bosch · Washer Moderate
E04 — Water Inlet Fault
Bosch's official US washer codes use an E:XX / F-code / icon format; a bare 'E04' is not in the official US list. The 'water inlet fault' explanation below is not confirmed on Bosch's US consumer page — verify against your model's manual.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Easy
- Verified against
- bosch-home.com ↗
How to fix it
- Confirm both hot and cold supply valves are fully open.
- Shut off the supply, disconnect inlet hoses, and clean the mesh screens.
- Straighten any kinks in the fill hoses.
- Reconnect, briefly open the valves to flush any debris into a bucket.
- If no fill, test the inlet valve solenoid resistance (~1000 ohms typical).
- Replace the inlet valve assembly if a solenoid is open.
Why it happens
Typical signs: No water enters drum · Slow fill · Cycle halts at start · Beeping at fill stage
- Water supply valves closed Hot/cold faucets at the wall are off or partially closed.
- Clogged inlet hose screens Mesh filters at the hose-to-valve connection clogged with sediment.
- Kinked supply hose Hose bent sharply behind the machine.
- Failed inlet valve solenoid Valve coil open or stuck closed.
- Low household water pressure Pressure below ~14 PSI prevents valve operation.
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 washer codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: bosch-home.com.