LG · Refrigerator
LG Refrigerator ER Error Code
General refrigerator system error
What this error means
ER prefixes many LG refrigerator faults—Er IF, Er FF, Er CF, Er dH, etc. A lone ER flash usually means the board logged an unspecified fault; read the second letters or numeral pair on the display for the specific subsystem.
How ER is detected
When ER 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 ER calls are resolved without parts: write down the full display string including letters after er. 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 ER 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
- Companion fan or sensor code not yet scrolled on display
- Power glitch confusing the UI
- Main PCB self-test failure
- Multiple simultaneous sensor faults after lightning
Step-by-step fixes
- 1Write down the full display string including letters after ER
- 2Power off breaker five minutes for a cold reset
- 3Check whether freezer temp is rising—indicates active cooling loss
- 4Match the full code to LG's chart in your model manual
When to call a technician
Provide the complete Er code to service—ER alone is not enough for parts ordering.
Affected models
- LG LFXS26973S
- LG LRMVS3006S
- LG LFXC22526S
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use refrigerators to prevent ER from lint and food debris buildup.
- Record when ER 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 ER; LG uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting ER; reversed plugs on pumps and valves cause immediate repeat faults.