LG ThinQ / Samsung SmartThings Diag Mode — Remote 1st Diagnosis

Wi-Fi connected appliance = remote error codes + stats

Check: **LG ThinQ** (2018+): ① App → 'Diagnosis Mode' → acoustic signal (outdoor mic analysis). ② Error code history, run time, compressor cycles, 30-day power. ③ Remote ON/OFF/temp/mode. ④ 'Attach diagnostic result' option in AS request. **Samsung SmartThings** (2020+): ① 'AI Diagnosis' auto-analysis (filter clean, ventilation, 13 items). ② AS chatbot 1st-level diag. ③ External tech can request 'diagnostic data share' (one-time token, 24h). **Use as external tech**: pre-visit 'send app diag result via KakaoTalk' → faster + correct parts ready.

What to do: **Use cases**: ① **'Won't run' report** → guide user to run 'Diagnosis Mode', KakaoTalk error code → pre-load parts (PCB/cap) in vehicle. ② **'Not cool'** → app stats (16+ hr/day, compressor 96%) → coil block/overload first guess. ③ **'Noise'** → ThinQ acoustic diag → impeller/bearing. ④ **Elderly** = children install app on parent's, remote monitor (linked to care package). **Constraint**: app subscription = user only; external tech can't subscribe (Privacy Act).