Samsung
Compressor Not Starting
Indoor unit has power but will not start cooling; only fan runs even when COOL mode is selected.
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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
Faulty outdoor PCB, Failed compressor, Open thermal protector, Communication failure between indoor and outdoor units
How to Fix / Troubleshooting
Safety first: Do not attempt to bypass any safety devices.
- Step 1 – Confirm mode and setpoint: Ensure the remote is set to COOL mode and the set temperature is at least 2–3°C below room temperature.
- Step 2 – Listen to outdoor unit: Check if the outdoor fan and compressor start when cooling is requested. If the outdoor unit is silent, suspect power or PCB issues.
- Step 3 – Check outdoor breaker/disconnect: Ensure the outdoor unit has power and the disconnect is ON.
- Step 4 – Observe error indicators: Some Samsung outdoor units have LEDs that blink error codes. Note the pattern for technician reference.
- Technician required: Compressor and inverter diagnostics require specialized tools. Contact a Samsung-authorized technician.
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Repair Difficulty
Hard
4/5
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