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Sub-Zero Group Owner's App Error E401, E402, or E601


  • How to fix E401, E402, or E601 error in mobile app
  • E-401, E-402, or E-601 shown on screen in Sub-Zero Group Owner's App
  • E 401, E 402, or E 601 error
  • App shows Time Set Up Failed


  • Appliance failed to execute operation
  • Mobile app did not understand communication


Appliance may not support action due to current state or may require a software update to support feature.

  1. Confirm that mobile app is up to date. Check the App Store to see if an update is available.
  2. Confirm appliance software is up to date. Refer to Product Software Updates for information.
  3. See also Connected Appliance Connectivity Troubleshooting and Sub-Zero Group Owner's App Troubleshooting.

If these steps do not resolve the issue, no further troubleshooting advice is available. Contact the Sub-Zero Customer Care Team at [email protected] or call (800) 222-7820, Monday-Friday, 7:00 a.m. - 7:00 p.m. CST. 


Need further assistance? Contact Customer Care at 800.222.7820 or provide your information below and request a Customer Care representative contact you.

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