Bosch Dishwasher Error Code E23: What It Means and How to Fix It Fast

⚡ E23 Error at a Glance

If your Bosch dishwasher shows E23, it usually signals a drain pump electrical fault.

👉 Translation: The dishwasher cannot drain water because the pump isn’t receiving or executing proper electrical signals.

🧾 What’s Going Wrong?

Think of E23 as a communication breakdown between the control system and the drain pump.

Instead of just a blockage (like E20), this is often a hardware or wiring issue.

🔍 Key Symptoms You’ll Notice

• Water remains at the bottom after a cycle

• Dishwasher stops mid-program

• No draining sound at all

• Error appears immediately after starting

These signs usually point to a deeper electrical or pump failure.

🧠 Main Causes Behind E23

🔌 1. Faulty Drain Pump

The most common reason. The pump motor may be burned out or internally damaged.

⚡ 2. Wiring or Connection Failure

Loose, broken, or corroded wires can interrupt power supply to the pump.

🧩 3. Control Board Malfunction

The control module may fail to send signals properly to the drain pump.

💧 4. Moisture Damage

Water leakage into electrical components can short-circuit the system.

🛠️ Step-by-Step Fix Guide

✔️ Step 1: Power Reset

• Turn off the dishwasher

• Unplug or switch off the breaker

• Wait 10 minutes

This can clear temporary electronic glitches.

✔️ Step 2: Check for Visible Blockages

Even though E23 is electrical, do a quick check:

• Remove filters

• Look into the pump area

• Clear any debris

✔️ Step 3: Inspect Drain Pump (Basic Check)

• Listen during drain cycle

• No sound = likely electrical issue

• Humming = possible partial failure

✔️ Step 4: Examine Wiring (Advanced)

⚠️ Only if you’re comfortable:

• Open the lower panel

• Check for loose or burnt wires

If unsure, skip this step.

✔️ Step 5: Replace Drain Pump

If confirmed faulty, replacing the pump usually resolves E23.

✔️ Step 6: Call a Professional

If the issue involves:

• Control board

• Internal wiring

• Repeated failure

It’s safer to get expert help.

🛡️ Prevention Tips

• Avoid overloading the dishwasher

• Clean filters regularly

• Check for leaks or moisture buildup

• Use proper detergent to prevent residue damage

• Run maintenance cycles monthly

🚨 When You Should Act Immediately

• Water not draining at all

• Burning smell

• Repeated E23 error after reset

Delaying repair can damage other internal components.

💬 Final Take

The E23 error in Bosch dishwashers is more serious than common drainage issues because it often involves electrical failure of the drain pump system.

While basic checks are worth trying, most cases require repair or part replacement.

Read More:

Dishwasher flashing lights? Causes, Meaning, and fixes

Dishwasher making grinding noise - Causes, fixes & prevention

Dishwasher spray arms not spinning

How to fix a dishwasher not cleaning dishes