E9
Goodman EEPROM / Memory Error on Control Board

Goodman mini-split displays E9 and unit will not operate

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Corrupted firmware on indoor PCB, Power surge damage to control board, Faulty replacement board not configured for model, Loose board connectors

How to Fix / Troubleshooting

Safety first: Turn off power at the breaker before accessing the control board.

Steps to check:

  • 1. Power reset: Turn off power for at least 10 minutes to allow the board to fully discharge. Restore power and see if E9 clears.
  • 2. Inspect board connections: Remove the indoor unit cover and locate the PCB. Gently press on all plug-in connectors to ensure they are fully seated.
  • 3. Check for surge damage: Look for burn marks, cracked components, or a burnt smell on the board. If present, the board must be replaced.

When to call a professional: EEPROM or firmware errors generally require board replacement with the correct Goodman part and sometimes configuration via dip switches or jumpers. This should be done by an HVAC technician.

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Repair Difficulty

Hard 4/5

Required Part

Indoor control board (PCB)
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