F6
Tristar
Indoor PCB–Display Panel Communication Error
Unit displays F6 and may not respond correctly to remote commands.
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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
Loose ribbon cable between display board and main PCB, Damaged display PCB, Corroded connectors from moisture, Faulty indoor main PCB communication circuit
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before removing the front panel.
Steps to try:
- Access display board: Remove the front cover to expose the display/indicator PCB.
- Check ribbon cable: Ensure the flat cable between the display and main PCB is fully inserted and locked in place.
- Inspect for moisture: Look for signs of condensation or water damage. Dry gently and improve room humidity control if needed.
- Reseat connectors: Disconnect and reconnect the cable to clean contacts.
When to call a technician: If F6 persists, either the display PCB or indoor main PCB may need replacement.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Display PCB
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