TCL
No Power / Power Supply Failure
Air conditioner does not turn on at all; no lights or 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
Tripped circuit breaker, Blown internal fuse on TCL PCB, Faulty power cord (portable/window), Defective main control board
How to Fix / Troubleshooting
Safety first: Ensure your hands are dry and stand on a dry surface when working with electrical components.
- Step 1 – Check breaker and outlet: Reset the breaker and test the outlet with another appliance. For window/portable units, ensure the plug is fully inserted.
- Step 2 – Inspect power cord: Look for visible damage, burns, or loose prongs. Replace the cord if damaged.
- Step 3 – Internal fuse: With power disconnected, remove the cover and locate the PCB fuse. Replace with the same rating if blown.
- Step 4 – PCB replacement: If the fuse blows again immediately or there is still no power, the main PCB may be faulty and should be replaced.
Warning: If breakers trip repeatedly, stop using the unit and call an electrician or technician to prevent fire risk.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Main Control PCB
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