Possible Meanings of error E21:

• Drain System Issue: Similar to error E20, E21 often indicates a drainage problem. This could be due to:
  • Clogged drain hose or filter
  • Faulty drain pump
  • Blocked drain pipe connected to the machine
• Water Level Sensor Problem: 
  • In some models, E21 might relate to a malfunctioning water level sensor. This sensor helps regulate the amount of water in the wash cycle, and a faulty one could create drainage issues.
• Other Electrical Issues: 
  • Rarely, E21 could signify more general electrical problems within the machine's internal components.

Troubleshooting the E21 error code in Electrolux Washing Machine

1. Identify Your Model: 
   • As mentioned, knowing your exact model is crucial. Find the model number on a label on the back of your machine or in your user manual.
2. Consult the User Manual: 
   • With your model number, refer to the Electrolux user manual for specific instructions related to the E21 error code. It will offer detailed troubleshooting steps based on your machine's design.
3. General Troubleshooting (Safety First! Unplug the machine):
   • Check the drain hose: Visually inspect the hose for kinks, blockages, or damage. Straighten it out if necessary and remove any debris you find.
   • Clean the drain filter: Locate the drain filter according to your user manual and clean it thoroughly.
   • Restart the machine: Sometimes, a simple restart can clear the error. Wait a few minutes after unplugging before restarting.
   • Check the drainpipe: If you can safely access the drainpipe, check for any blockages and clear them if possible.

Additional Tips:

• Reduce load size: An overloaded machine can strain the drainage system. Consider using a smaller load for the next cycle.
• Check water pressure: Inadequate water pressure can affect the drainage process.
• Use high-efficiency detergent: This type of detergent produces less suds, which can reduce the risk of blockages.

If the Error Persists:

• Contact Electrolux Support: If the error remains after trying these steps, it's highly recommended to contact Electrolux support for further assistance. They can provide model-specific guidance and potentially arrange for a qualified technician to diagnose and repair the issue safely.

Important Notes:

• Do not attempt repairs yourself: Unless you have expertise in electrical and appliance repair, avoid DIY fixes. Incorrect repairs can worsen the problem and pose safety risks.
• Prioritize your user manual: Always prioritize the instructions in your Electrolux user manual or from Electrolux support.

Remember, identifying your specific model is crucial for accurate diagnosis and troubleshooting. I hope this information helps!