Bosch Washing Machine Error E18: Troubleshooting Guide

Encountering an error code on your Bosch washing machine can be frustrating. Error code E18 typically indicates a drainage problem. This means the machine isn’t emptying water properly. Here’s a comprehensive guide to troubleshoot and fix this issue.

Understanding Error E18

Before diving into troubleshooting, it’s crucial to understand what the E18 error signifies. As mentioned, it points to a drainage issue. Several factors can cause this, ranging from a simple blockage to a malfunctioning pump.

  • Clogged Drain Filter: The most common culprit. This filter traps debris like lint, coins, and small objects, preventing them from entering the drain pump.
  • Blocked Drain Hose: The hose that carries the water away from the machine can become kinked, twisted, or blocked.
  • Faulty Drain Pump: The pump responsible for expelling water might be defective.
  • Blocked Sink Drain (Indirect Drainage): If your washing machine drains into a sink, a blockage in the sink drain can prevent the washing machine from draining.
  • Pressure Sensor Issues: In rare cases, a faulty pressure sensor might incorrectly detect water levels and trigger the error.

Troubleshooting Steps

Follow these steps in order, starting with the simplest solutions. Always disconnect the washing machine from the power supply before attempting any repairs.

1. Check and Clean the Drain Filter

This is the first and most important step.

  1. Locate the Drain Filter: It’s usually located at the bottom front of the washing machine, behind a small access panel. You might need a screwdriver to open the panel.
  2. Prepare for Water Spillage: Place a shallow container or towel under the access panel to catch any water that spills out.
  3. Carefully Unscrew the Filter Cap: Turn the cap counterclockwise. Some water will likely flow out. Unscrew slowly to control the flow.
  4. Remove and Clean the Filter: Remove the filter and thoroughly clean it under running water. Remove any lint, hair, coins, buttons, or other debris.
  5. Inspect the Filter Housing: Check inside the filter housing for any obstructions. You can use a small brush or your fingers to remove any debris.
  6. Reinstall the Filter: Once everything is clean, reinsert the filter and tighten the cap securely clockwise.
  7. Close the Access Panel: Secure the access panel back in place.

2. Inspect the Drain Hose

Check the drain hose for kinks, twists, or blockages.

  1. Locate the Drain Hose: It’s usually connected to the back of the washing machine and leads to either a standpipe or a sink drain.
  2. Inspect for Kinks or Twists: Straighten any kinks or twists in the hose.
  3. Disconnect the Hose: Carefully disconnect the hose from both the washing machine and the drainpipe or sink drain.
  4. Check for Blockages: Inspect the hose for any blockages. You can use a garden hose to flush out any debris.
  5. Reattach the Hose: Reattach the hose securely to both the washing machine and the drainpipe or sink drain.

3. Check the Sink Drain (If Applicable)

If your washing machine drains into a sink, ensure the sink drain is clear.

  1. Check for Standing Water: If the sink is full of water, it indicates a blockage.
  2. Use a Plunger or Drain Cleaner: Try using a plunger to clear the blockage. You can also use a drain cleaner, but follow the instructions carefully.

4. Test the Drain Pump

If the filter and hose are clear, the drain pump might be faulty. This step requires some technical knowledge. If you’re not comfortable working with electrical components, consult a qualified appliance repair technician.

  1. Locate the Drain Pump: The drain pump is usually located near the bottom of the washing machine. Refer to your washing machine’s service manual for the exact location.
  2. Disconnect the Wires: Disconnect the wires from the drain pump.
  3. Test the Pump with a Multimeter: Use a multimeter to test the pump for continuity. If there’s no continuity, the pump is likely faulty.
  4. Replace the Pump: If the pump is faulty, replace it with a new one. Ensure you purchase the correct replacement pump for your Bosch washing machine model.

5. Check the Pressure Sensor

A faulty pressure sensor can sometimes trigger the E18 error. This is a less common issue, but it’s worth considering if other troubleshooting steps haven’t worked. Again, this step requires technical knowledge. If you are not comfortable, please consult a qualified technician.

  1. Locate the Pressure Sensor: Consult your washing machine’s service manual.
  2. Inspect the Sensor and Connections: Look for any visible damage or loose connections.
  3. Test the Sensor: Testing often involves a multimeter and comparing readings to specifications. This is best left to a professional.

Resetting the Washing Machine

After attempting the above solutions, try resetting your washing machine.

  1. Turn off the Washing Machine: Turn off the washing machine and unplug it from the power outlet.
  2. Wait 5-10 Minutes: Wait for 5-10 minutes to allow the machine to reset.
  3. Plug in and Turn on: Plug the washing machine back in and turn it on.
  4. Run a Test Cycle: Run a test cycle to see if the error code has cleared.

When to Call a Professional

If you’ve tried all the troubleshooting steps and the E18 error persists, it’s time to call a qualified appliance repair technician. They can diagnose and repair more complex issues, such as a faulty control board or internal wiring problems.

Important Safety Tips

  • Always disconnect the washing machine from the power supply before attempting any repairs.
  • If you’re not comfortable working with electrical components, consult a qualified appliance repair technician.
  • Be careful when handling water. Clean up any spills immediately to prevent slips and falls.