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600 Series Error Code 21


  • 600 Series displays 21
  • Error code 21 appears on 600 Series
  • 600 Series unit E21
  • EC21
  • EC 21


  • Defrost overheat


  1. If temperatures are high, call for service.
  2. If temperatures are near normal, see How to Clean the Condenser.
  3. Press and hold the door ajar alarm key for 15 seconds to clear the error code.
    • Models prior to serial number 1810000 do not have a door ajar alarm key.
    • Clear error code by turning the unit OFF, then back ON.
  4. If the error code or service light appears or temperatures rise, contact service for repair.
  5. If these steps do not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.


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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