Possible causes or Err1 code:

• Door not properly closed: 
  • This is the most common cause. Ensure the door is shut firmly and the latch is engaged completely. Check for any clothing or debris stuck between the door and gasket that might prevent a proper seal.
• Faulty door lock: 
  • If the door seems to be closing properly but the error persists, the lock itself might be malfunctioning.
• Leveling issues: 
  • An unevenly leveled washing machine can put stress on the door lock, leading to errors.
• Electronic issues: 
  • In rare cases, the error could be due to a problem with the washing machine's control board.

Troubleshooting the Err1 error code in Haier Washing Machine

1. Open and close the door firmly: 
   • This simple step can often resolve the issue if the door wasn't closed properly.
2. Check for obstructions: 
   • Make sure there are no clothes or debris caught in the door seal or latch mechanism.
3. Level the machine: 
   • If the machine is not level, adjust the feet to ensure it is stable.
4. Reset the machine: 
   • Unplug the machine for a few minutes and then plug it back in. This can sometimes clear temporary glitches.
5. Consult the user manual: 
   • Your manual might have specific troubleshooting steps for the Err1 code depending on your model.

If the above steps don't resolve the issue:

• Contact Haier support: They can offer further assistance and advise if professional repair is needed.
• Consider professional repair: If the cause seems complex or you're not comfortable troubleshooting yourself, a qualified technician can diagnose and fix the problem.

Additional information:

• The specific meaning of the Err1 code might vary slightly depending on your Haier washing machine model.
• Some resources online mention other potential causes for the Err1 code, such as problems with the drain pump or water inlet valves. However, these are less common and usually require more advanced troubleshooting.

If you've tried the troubleshooting steps above and the error persists, it's best to consult a qualified technician or Haier support for further assistance.