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736 Series Error Code 21

Topics:

  • 736 Series displays 21
  • 736 21
  • Error code 21 appears on 700 Series

Troubleshooting:

Turn the home circuit breaker to the unit off for 30 seconds then back on again. Retest the unit operation.

Answer:

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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