E416
Samsung
Indoor Unit Power Supply Overvoltage / Undervoltage
Indoor unit shows E416; unit may shut down unexpectedly.
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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
Unstable mains voltage, Loose power connections, Faulty indoor power supply circuit, Incorrect supply voltage
How to Fix / Troubleshooting
Safety warning: Working on live mains wiring is hazardous. If you are not qualified, limit yourself to visual checks and call an electrician.
- Step 1 – Check supply voltage rating: Confirm that your Samsung AC is rated for the local mains voltage (e.g., 220–240 V). Using the wrong voltage can trigger E416.
- Step 2 – Inspect power connections: With power OFF, check the indoor unit terminal block for loose screws or burnt wires. Tighten as needed.
- Step 3 – Use a surge protector: If your area has frequent voltage fluctuations, consider installing a dedicated voltage stabilizer or surge protector for the AC.
- Step 4 – Electrician/technician tasks: Persistent E416 indicates serious supply or PCB issues. An electrician should check the supply, and a technician may need to replace the indoor PCB power module.
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Repair Difficulty
Hard
4/5
Required Part
Indoor Power Supply Module
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