Model reference
LG LP121HEM-Y8
Air Conditioner
2 documents14 error codes1 service mode
Available documentation
Service Manual
- Window Air Conditioner SVC MANUAL MODEL: LP121HEM-Y848 pg
Training
- Product Training PTAC/PTHP83 pg
MyPros+ Max
Diagnose your LG LP121HEM-Y8.
- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
- Verified part numbers when replacement is needed
Start diagnosing
$29/month · Cancel anytime · Or $9.95 3-day pass
Error codes (14)
CodeMeaning
1Indoor Air Thermistor Error (Manual Controls LED flash code2Indoor Coil Thermistor Error (Manual Controls LED flash code3Outdoor Air Thermistor Error4Outdoor Coil Thermistor Error5Mode Error (Manual Controls LED flash code6Set point Error (Manual Controls LED flash code7Bad Thermistor Wiring (Manual Controls LED flash codeCH 01Indoor Air Thermistor ErrorCH 02Indoor Coil Thermistor ErrorCH 03Outdoor Air Thermistor Error (PTHP Only)CH 04Outdoor Coil Thermistor Error (PTHP Only)CH 05Mode ErrorCH 06Set point ErrorCH 07Bad Thermistor WiringService modes (1)
- Self-Diagnosis (LED Diagnostics)The green OPERATION LED on the Display PCB automatically indicates errors by flashing a specific…
Full entry steps, exit procedures, and test sequences are available in Max.
Related LG air conditioner models
78,000+ service manuals · 160,000+ error codes · 55+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass