Possible Causes of the E7 error code:

• Incorrect usage: 
  • Using a Mini Washer without a main washing machine stacked on top.
• Faulty stacking switch: 
  • The physical switch itself might be damaged or malfunctioning.
• Loose wiring: 
  • The wiring connections to the stacking switch could be loose or damaged.
• Control board issue: 
  • In rare cases, a problem with the main control board might misinterpret stacking switch signals.

Troubleshooting the E7 error code in LG Washing Machine

Important Note: Due to the potential risk of electrical shock and internal components involved, it's strongly recommended to contact LG support or a qualified appliance technician for assistance with the E7 error if you're uncomfortable performing electrical repairs or disassembling the machine yourself.

However, if you're confident in your abilities and comfortable proceeding, here are some initial steps you can try:

1. Ensure proper usage: 
   • Verify that you're using a Mini Washer in conjunction with a compatible main washing machine stacked on top.
2. Check the stacking switch: 
   • Visually inspect the switch for any visible damage or loose connections. Refer to your user manual for the switch location.
3. Reset the machine: 
   • Disconnect the power cord for 30 seconds, then reconnect it and try restarting the cycle.
4. Consult your user manual: 
   • Refer to your specific model's user manual for detailed troubleshooting instructions related to the E7 error code. It might provide additional diagnostic information or model-specific solutions.

If the E7 Error Persists:

• Contact LG support: They can offer tailored guidance based on your model and potential warranty coverage.
• Seek professional repair: A qualified appliance technician can diagnose the exact cause of the stacking issue and perform necessary repairs safely and effectively.

Additional Tips:

• Always follow the manufacturer's instructions for stacking LG washing machines.
• Regularly inspect the stacking switch and connections for any signs of damage or wear.
• Consider using a surge protector to protect your appliances from electrical fluctuations.

Remember:

• Safety first! Avoid forceful attempts to disassemble the machine or manipulate the stacking switch if you're unsure.
• If the issue persists, prioritize professional assistance to ensure proper diagnosis and repair.
• Always consult your user manual for the most accurate instructions for your specific LG washing machine model.