Sub-Zero Classic Series (BI) Control Faults | High Voltage System | Bad Micro Communication | Error 90 H 83
- Error code 90 H 83
- Classic Series (BI) shows 90 H 83
- 90 H 83
- Control faults high-voltage system bad micro communication
- Communications problems on main board
- Turn the home circuit breaker to the unit off for 30 seconds then back on again.
- Retest the unit operation.
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