Want a regional phone & address? Pick your area.
LG·refrigeratorhigh severity
LG Error Code Er FS
Freezer sensor error
Common Causes
- 1Thermistor failure
Step-by-Step Troubleshooting
- 1
Access the freezer thermistor located behind the rear panel inside the freezer compartment, typically clipped to the evaporator housing
- 2
Disconnect the thermistor and measure resistance with a multimeter — at 0F (-18C) it should read approximately 16k ohms (NTC type)
- 3
Check the thermistor wire harness for breaks or pinches where it routes through the freezer wall insulation
- 4
Inspect the main control board connector for the freezer sensor input — corrosion from moisture intrusion is common on bottom-freezer LG models
- 5
If resistance reads open or shorted, replace the thermistor assembly
Pro Diagnostic Tip
LG thermistors are NTC (negative temperature coefficient) — resistance decreases as temperature rises. If the sensor reads abnormally low resistance at normal freezer temps, the freezer will overcool and ice up before eventually throwing Er FS.
You Might Also Notice
- •Freezer running too cold or not cold enough
- •Temperature display shows incorrect reading
- •Ice crystals forming on food
- •Compressor running non-stop
Parts, Cost & Difficulty
Repair Difficulty
Moderate — Some Experience NeededEstimated Repair Cost
$130–$240
Parts + labor. Free diagnosis with repair.
Parts That May Need Replacement
EBG61285804 (Freezer Thermistor)ABQ75742501 (Wire Harness)
Do You Have the Right Tools?
Refrigerant gauges ($200+), vacuum pump ($250), leak detector ($150), and EPA-certified recovery equipment. Our technician arrives with $15K+ in professional tools — your diagnostic is free.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Safety First — Know the Risks
Refrigerant (R-134a/R-600a) requires EPA certification to handle. Improper discharge is a federal violation and health hazard. Our techs are licensed and insured — let them handle the risk.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Get Professional Help Now
Error code Er FS is a high-severity issue that can cause further damage to your refrigerator if left unresolved. A licensed technician can diagnose and fix it the same day.
Licensed & Insured · 90-Day Warranty · Same-Day Appointments Available
4.85 (232 verified reviews)
Same-Day Appliance Repair
Fixed or It's Free
$89 → $0 Service Call & Diagnosis — offer ends May 31
Frequently Asked Questions
What does LG error code Er FS mean?
LG error code Er FS indicates: Freezer sensor error. This is a high-severity issue affecting your refrigerator.
How do I fix LG error code Er FS?
Access the freezer thermistor located behind the rear panel inside the freezer compartment, typically clipped to the evaporator housing Then, Disconnect the thermistor and measure resistance with a multimeter — at 0F (-18C) it should read approximately 16k ohms (NTC type) Then, Check the thermistor wire harness for breaks or pinches where it routes through the freezer wall insulation There are 2 more steps — see the full troubleshooting guide above. This repair typically requires professional tools and expertise.
How do I know if my refrigerator has error Er FS?
Besides the error code on the display, common signs include: Freezer running too cold or not cold enough; Temperature display shows incorrect reading; Ice crystals forming on food. If you notice any of these symptoms, check your refrigerator's display panel for error code Er FS.
How much does it cost to fix LG Er FS?
Repair costs for LG Er FS typically range from $130 to $240 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.