Bosch Washer Error Code E23

Bosch Washer Error Code E23 — Drain Pump / Drain System Fault Explained

The Bosch E23 error code on a washer typically indicates a drain or pump problem: the machine cannot empty water properly. This happens when the drain pump is blocked, the drain filter is clogged, the drain hose is kinked or obstructed, or the pump motor/electrical circuit fails. Users commonly notice water left in the drum after a cycle, extended cycle times as the washer repeatedly tries to drain, unusual noises during draining, bad odors from standing water, and in worst cases risk of water overflow or leaks. Left unaddressed, E23 can lead to mold growth, damaged laundry, and increased wear on electronic components as the washer repeatedly attempts to clear the fault.

Common Causes

• Clogged pump filter full of lint, coins, buttons, or debris
• Foreign object stuck in the pump impeller or pump housing
• Kinked, crushed, or blocked drain hose or external plumbing obstruction
• Faulty or seized drain pump motor
• Electrical/connectivity problem: damaged wiring or loose connector to the pump
• Control board or pump relay failure (less common)
• Incorrect installation height of drain hose or blocked household drain trap

Troubleshooting Steps

1. Power and safety first: unplug the washer or switch off the breaker and turn off the water supply before inspecting anything.
2. Reset the machine: disconnect power for 1–2 minutes then reconnect to see if the code clears (temporary resets can help with intermittent errors).
3. Check and clean the pump filter: open the access panel (or filter cap) and remove lint, coins, hairpins and residue. Be prepared for water spill—have towels and a shallow pan ready.
4. Inspect the pump area visually: remove the filter and look into the pump housing for trapped objects; rotate the impeller by hand (when safe) to ensure it moves freely.
5. Examine the drain hose: verify there are no kinks, clogs, or restrictions and that the hose is correctly positioned and not inserted too far into the standpipe.
6. Test the drain pump operation: run a drain/spin cycle after cleaning the filter. Listen for the pump running—if silent or making grinding sounds, the pump may be failing.
7. Check electrical connections: inspect the wiring harness to the pump for loose plugs, corrosion, or damaged wires. Re-seat connectors if accessible and safe to do so.
8. Measure pump continuity (advanced): if you have a multimeter and are comfortable working safely, test pump motor windings for continuity. No continuity or open circuit indicates a bad pump.
9. Verify household plumbing: ensure the standpipe or sink the washer drains into is not clogged and the trap allows water to flow freely.
10. Replace the drain pump if defective: if cleaning and basic tests don’t fix the issue and the pump is noisy, seized, or electrically open, replace the pump assembly.
11. Call a professional technician if the issue persists: if the error recurs after replacing the pump or you suspect control board or complex wiring faults, get a Bosch-authorized repair technician to diagnose and repair safely.

Maintenance / Prevention Tips

• Clean the pump filter every 1–3 months depending on usage.
• Empty pockets before washing—coins, keys, and small objects cause most pump blockages.
• Use mesh laundry bags for small items like socks to prevent them slipping into the pump area.
• Avoid overloading the washer; excess load can force small items into the drain filter.
• Inspect and straighten the drain hose periodically to prevent kinks and crushing.
• Keep the washer area well-ventilated and dry to reduce buildup and odors.
• Run a monthly maintenance wash (empty, hot cycle with a washer cleaner) to reduce residues that could clog drains.
• Use the recommended detergent amounts to avoid excessive suds that can interfere with drainage.
• Securely install the drain hose at the correct height and avoid inserting it too far into the standpipe.
• Replace old or brittle drain hoses every 5 years or when damaged.
• Check pump access and drain connections during seasonal maintenance or when moving the washer.
• Address small leaks or odd noises early—these signs often precede bigger drain failures.

FAQs

What exactly does E23 mean on my Bosch washer?

E23 indicates the washer is experiencing a drain/pump fault—either it can’t evacuate water or the pump is blocked or non-functional. The exact meaning can vary slightly by model, but it always points to a drainage problem.

Can I run the washer after getting E23?

It’s not recommended to continue regular cycles. The washer may fill and then fail to drain, leaving water in the drum that can spill or damage laundry. If you must, only run drain or spin cycles to attempt clearing water and avoid unattended operation.

How hard is it to replace the drain pump myself?

For a mechanically-inclined user with basic tools, accessing and replacing the drain pump is a moderate DIY task. It requires disconnecting power, draining residual water, removing panels, and swapping the pump with attention to wiring and hose clamps. If you’re unsure, call a professional.

How much does a repair usually cost?

Costs vary: a replacement drain pump part typically ranges from an economical component to moderate cost depending on model; labor can add significantly. Expect a DIY part cost lower than professional service; authorized service visits may cost more but include warranties.

Conclusion / Safety Notice

Always prioritize safety: disconnect power and turn off water supply before inspecting the washer. Working on the pump and wiring can present electrical and water-damage risks. If troubleshooting steps (cleaning filter, checking hose, basic pump checks) do not resolve E23, or if you encounter corroded connectors, seized motor, or electronic control issues, stop and contact a Bosch-authorized technician. Professional service ensures correct parts, safe repairs, and protects warranties.

If you feel confident, follow the recommended troubleshooting sequence and use proper tools and protective gear. Otherwise, schedule service—especially when the repair involves electrical testing, control board diagnosis, or complex disassembly. Prompt attention helps prevent water damage and restores safe, reliable washing.