LG · Refrigerator
LG Refrigerator CHE Error Code
Compressor or inverter communication fault
What this error means
CHE is a Compressor Error on LG linear inverter refrigerators—the main board lost valid feedback from the inverter or compressor windings. Cooling may stop while the display shows CHE, and freezer temps climb within hours.
How CHE is detected
When CHE appears on a LG refrigerator, the control board has confirmed that water did not leave the machine within the programmed drain window. On LG LFXS26973S, LG LRMVS3006S, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most CHE calls are resolved without parts: unplug or flip the breaker for five minutes for a full board reset. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If CHE returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Loose three-wire harness between main PCB and inverter board at the rear bottom
- Inverter board overheated after condenser coils were never cleaned
- Compressor winding fault detected by the inverter driver
- Power surge damaging inverter communication circuitry
Step-by-step fixes
- 1Unplug or flip the breaker for five minutes for a full board reset
- 2Pull the fridge forward safely and vacuum condenser coils at the bottom rear grille
- 3Reseat the inverter-to-compressor harness plug—LG marks it with a colored clip
- 4Monitor freezer temp for four hours after reset; note whether CHE returns on schedule
When to call a technician
CHE that reappears within three hours after coil cleaning and harness reseat requires inverter board or compressor diagnosis—live compressor tests only.
Affected models
- LG LFXS26973S
- LG LRMVS3006S
- LG LRFVS3006S
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use refrigerators to prevent CHE from lint and food debris buildup.
- Record when CHE appears in the cycle and whether it clears after a 60-second power reset on your LG refrigerator—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for CHE; LG uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting CHE; reversed plugs on pumps and valves cause immediate repeat faults.