F6
Goodman Current Sensor / Inverter Module Fault

Goodman inverter system displays F6 and compressor speed is limited or unit shuts down

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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

Faulty current transformer or sensor on outdoor PCB, Damaged inverter power module, Loose compressor wiring, Power quality issues (voltage imbalance, surges)

How to Fix / Troubleshooting

Safety first: Turn off power at the main breaker and outdoor disconnect. Inverter circuits store high voltage; do not touch components until fully discharged.

Steps a homeowner can safely take:

  • 1. Inspect wiring: With power off, check that compressor and power wiring connections on the outdoor board are tight and not burnt.
  • 2. Look for visible board damage: Examine the inverter/power board for burnt areas, cracked components, or a burnt smell.
  • 3. Power reset: After at least 10 minutes off, restore power and see if F6 reappears.

When to call a professional: F6 typically requires specialized tools to test the inverter and current sensors. Board or compressor replacement must be done by a licensed HVAC technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Outdoor inverter/power board
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