Samsung
No Power to Indoor Unit
Unit does not turn on at all; no lights or display on indoor unit.
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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 indoor PCB, Loose power wiring at terminal block, Faulty indoor PCB power supply
How to Fix / Troubleshooting
Safety warning: Always turn off the main breaker before opening electrical panels.
- Step 1 – Check breaker: Locate the dedicated AC breaker in your electrical panel. If tripped, reset once. If it trips again, do not continue resetting.
- Step 2 – Verify outlet or supply: For window or portable Samsung ACs, test the wall outlet with another appliance.
- Step 3 – Inspect indoor terminal block: With power OFF, remove the indoor unit cover and check that L, N, and ground wires are secure and not burnt.
- Step 4 – Look for PCB fuse: Some indoor PCBs have a small glass or blade fuse. If visibly blown, the cause must be identified before replacement.
- Technician required: If there is still no power after these checks, the indoor PCB or power module likely needs professional replacement.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Unit Main PCB
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