H0
Sharp
Indoor Unit EEPROM / Memory Error
Unit does not respond to remote; H0 may flash on the display.
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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, Loose display board connection, Failed indoor main PCB
How to Fix / Troubleshooting
Safety first: Turn off the indoor unit breaker before opening the control box.
- Power reset: Disconnect power for 10–15 minutes, then restore. Sometimes memory errors clear after a full reset.
- Check display board cable: Remove the front panel and access the display/IR receiver board. Ensure the ribbon cable or harness to the main PCB is firmly connected.
- Surge protection: If H0 occurred after a storm or outage, inspect the PCB for burn marks. Consider adding an external surge protector for future protection.
- PCB replacement: If H0 persists, the indoor main PCB may need replacement. Use the exact Sharp part number for your model.
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Repair Difficulty
Hard
4/5
Required Part
Indoor Main Control PCB
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