F4
Leisure
Display PCB / User Interface Communication Fault
Freezer shows F4; compressor and fans may stop; unit may not respond to controls.
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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 or damaged communication harness between display and main PCB, Failed display PCB, Corroded connectors due to condensation, Main PCB communication driver fault
How to Fix / Troubleshooting
Safety: Unplug the freezer before removing the control fascia or accessing PCBs.
Steps to resolve F4 (UI communication):
- 1. Access control fascia: Remove screws securing the top/front control panel and gently pull it forward.
- 2. Check ribbon cable/harness: Inspect the cable between the display PCB and main PCB for kinks, cuts, or loose plugs. Reseat both ends.
- 3. Look for moisture: If condensation has entered the fascia, dry the area thoroughly. Consider improving door seal or room humidity if this recurs.
- 4. Test operation: Restore power and see if the display responds and F4 clears.
- 5. Replace display PCB if needed: If the harness is good but the display remains dead or erratic, install a new Leisure display PCB / user interface board.
- 6. If issue persists: The main control PCB communication circuit may be faulty and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Display PCB / User Interface Board
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