Possible Causes of E18 error code:

• Blocked drain hose: 
  • This is the most common culprit. Debris, coins, or lint can accumulate in the hose, obstructing the water flow.
• Blocked drain pump: 
  • Similar to the hose, the pump itself can become clogged with objects or residue, hindering its function.
• Kinked drain hose: 
  • If the hose is bent or twisted, it can restrict the water flow and trigger the error.
• Faulty drain pump: 
  • In rare cases, the pump itself might be malfunctioning, requiring repair or replacement.

Troubleshooting the E18 error code in Bosch Washing Machine

1. Check the drain hose: 
   • Disconnect the hose from the back of the machine and inspect it for blockages. Remove any debris you find and ensure the hose isn't kinked.
2. Clean the drain filter: 
   • Most Bosch washing machines have a dedicated drain filter accessible through a small panel on the front or bottom of the machine. Consult your manual for its location and instructions on cleaning it.
3. Inspect the drain pump: 
   • Depending on your model, you might be able to access the drain pump for visual inspection. Look for any visible blockages or damage. 
   • Caution: Avoid attempting to remove the pump yourself unless you're comfortable with basic appliance repairs.
4. Run a drain cycle: 
   • Some Bosch models have a dedicated drain cycle. Use it to see if the machine can drain the water without clothes.
5. Reset the machine: 
   • Unplug the machine for 30 seconds and then plug it back in. This can sometimes clear temporary glitches.

If the error persists after trying these steps, it's best to consult a qualified appliance repair technician or contact Bosch customer service for further assistance. They can diagnose the problem more accurately and recommend the appropriate repair or replacement.

Additional Tips:

• Regularly clean the drain filter to prevent future blockages.
• Avoid overloading the washing machine, as this can put extra strain on the drainage system.
• Use the correct detergent type and amount for your machine to minimize suds buildup, which can contribute to blockages.