600 Series Error Code 21
- 600 Series displays 21
- Error code 21 appears on 600 Series
- 600 Series unit E21
- EC 21
- Defrost overheat
- If temperatures are high, call for service.
- If temperatures are near normal, see How to Clean the Condenser.
- 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.
- If the error code or service light appears or temperatures rise, contact service for repair.
- If these steps do not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.
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