Samsung Mini Split C108 Error Code
Check your model first
- WindFree 3.0 / AR+C (official quick guide)
- Newer Samsung R-32 residential series (SplitAtlas manual-aligned)
Match the model on your equipment label to the linked manufacturer documentation. The same code can mean different things across model families.
Quick answer
On WindFree 3.0 / AR+C manuals, C108 is a set-address error - the indoor unit's address setting is wrong or unreadable. On newer Samsung R-32 residential series the same display is tied to an indoor evaporator sensor error. Power cycle once; addressing and sensors are technician work.
Severity: medium · DIY difficulty: easy
Safety
Stop at the single power-cycle check. Address setting requires Samsung service-tool configuration and the evaporator sensor sits inside the indoor chassis - both are technician-only.
What C108 means
C108 means, per the Samsung WindFree 3.0 / AR+C Installer Quick Guide (DB68-12003A-01), a SET ADDRESS ERROR - the indoor unit's address setting is wrong or cannot be read. Samsung's newer R-32 residential diagnostics instead tie the C108 display to an indoor MID / indoor-inlet EVA-TH (evaporator) sensor error. Samsung C-code assignments are generation-dependent; verify against your model's manual.
Code meaning varies by series
- WindFree 3.0 / AR+C (official quick guide): Set address error (address setting wrong/unreadable)
- Newer Samsung R-32 residential series (SplitAtlas manual-aligned): Indoor MID / indoor-inlet EVA-TH (evaporator) sensor error
Causes, ranked
1. Indoor unit address setting wrong or unreadable (official WindFree 3.0 meaning) common pro only
Check: Address verification requires Samsung service-tool configuration.
Fix: Technician: verify and set the indoor address with the service tool.
2. Transient control fault that clears after one reset common DIY
Check: Power cycle once at the breaker and run a full cycle.
Fix: If C108 returns, stop resetting and schedule service.
3. Indoor evaporator (EVA-TH) sensor error (newer R-32 series meaning) occasional pro only
Check: Requires resistance measurement against the Samsung sensor table.
Fix: Technician: test and replace the evaporator sensor.
4. Indoor PCB fault after address and sensor verify good rare pro only
Check: Board-level diagnosis only.
Fix: Technician: diagnose the indoor PCB.
Related codes
Samsung C101 · Samsung C121 · Samsung C142
Sources
Related Mini Split guides
Mini-Split Communication Error: DIY Checks · Mini-Split Flashing Light Decoder: Blink Patterns · How to Reset a Mini-Split After a Power Outage · Mini-Split Sensor Errors: How to Test a Thermistor