Hisense No Power / Dead Unit

Hisense 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 PCB, Faulty power cord or plug (portable/window units), Loose power terminal connections

How to Fix / Troubleshooting

Safety first: Do not work inside live electrical panels. Turn off the breaker before opening any covers.

  • Step 1 – Check power source:
    • Verify the wall outlet has power by plugging in another device (for portable/window units).
    • Check the dedicated breaker for split systems and reset if tripped.
  • Step 2 – Inspect power cord (portable/window):
    • Look for cuts, burns, or loose plugs.
    • Do not use the unit if the cord is damaged; replace the cord or have it serviced.
  • Step 3 – Check indoor unit indicator:
    • If there is still no display, an internal fuse or PCB may have failed.
  • Step 4 – Technician repair: Internal fuses and PCBs should be tested and replaced by a qualified technician to avoid fire or shock hazards.
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Repair Difficulty

Medium 3/5

Required Part

Indoor Main Control Board (PCB)
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