H0
TCL
EEPROM Parameter Error / PCB Configuration Fault
Display shows H0 and unit may not start compressor
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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 EEPROM on indoor or outdoor PCB, Incorrect PCB replacement without proper configuration, Power surge damage to memory circuit
How to Fix / Troubleshooting
Safety first: Turn OFF power before accessing control boards.
- Step 1 – Power reset: Disconnect power for 10 minutes, then restore and test. Sometimes transient memory errors clear.
- Step 2 – Verify correct PCB: If a board was recently replaced, confirm the installed PCB matches the exact TCL part number for your model and capacity.
- Step 3 – Reinitialize (technician): Some TCL boards require configuration via service remote or DIP switches. A technician should verify and set these correctly.
- Step 4 – Replace PCB: If H0 persists, replace the affected PCB (indoor or outdoor) with a new, correctly programmed board.
Warning: Incorrect board configuration can cause compressor damage or unsafe operation.
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Repair Difficulty
Hard
4/5
Required Part
Indoor Main Control PCB
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