A freezer that’s not keeping food frozen can result in significant food loss. This guide helps you determine whether it’s a simple fix or a sealed system issue requiring professional repair.
Target Temperature
An LG freezer should maintain 0°F (–18°C) for safe food storage. Use an appliance thermometer to verify the actual temperature rather than relying on the display, which shows the set point, not the actual interior temperature.
Simple Checks First
- Condenser coils — dusty condenser coils are the #1 cause of reduced cooling in older freezers. The coils are on the back (chest freezers) or underneath (some uprights). Vacuum them with a brush attachment annually.
- Door/lid gasket — a damaged seal lets warm humid air in continuously, making the compressor run constantly without maintaining temperature. Close the lid on a dollar bill — if it pulls out easily, the seal is compromised.
- Thermostat setting — verify the setting has not been accidentally changed.
- Defrost drain — frost-free upright freezers have a defrost system; if ice accumulates at the back of the freezer, the defrost heater has failed, reducing airflow.
Condenser Fan
Freezers with forced-air condenser cooling have a fan near the compressor. If this fan stops (bearing failure, debris obstruction), the condenser overheats and the compressor is unable to maintain proper temperatures. Listen for the fan running when the compressor runs — if you hear the compressor but not the fan, the fan motor has failed.
Start Relay
The compressor start relay is a small component that provides the initial jolt to start the compressor motor. A failed relay prevents the compressor from starting. Listen for the compressor attempting to start with a click and brief hum before giving up — this pattern every few minutes indicates a failed start relay. The relay is inexpensive and a common DIY fix.
Sealed System Failure
If the compressor runs continuously but the freezer cannot reach 0°F, there may be a refrigerant leak or compressor failure. This requires professional diagnosis and EPA-certified refrigerant handling. Do not delay — food spoilage and compressor burnout can result from sustained operation under these conditions.
Why Professional Service May Be the Right Choice
While many Freezer issues can be addressed with the steps in this guide, there are situations where attempting a DIY repair can make the problem worse or void your warranty. If you've followed the steps above and the issue persists, or if you're not comfortable working with electrical components or water connections, calling a factory-certified technician is the safest and most cost-effective path forward.
LG Appliance Experts technicians are trained directly to LG's service specifications. They arrive with the most common OEM replacement parts already on the vehicle, which means most repairs are completed in a single visit — no waiting for parts to be ordered.
Preventing the Problem from Recurring
Most Freezer issues that require repair are preventable with regular maintenance. Key habits that extend appliance life and reduce fault frequency:
- Clean filters regularly. Lint filters, drain pump filters, and water inlet screens accumulate debris over time. A clogged filter is one of the most common causes of performance issues and error codes.
- Don't overload. Consistently running your Freezer beyond its rated capacity puts extra stress on the motor, drum bearings, and suspension components.
- Use the correct detergent and amounts. Excess detergent — especially non-HE detergent in HE appliances — causes buildup, mold, and sensor errors over time.
- Check hoses and connections annually. Inspect inlet and drain hoses for cracks, kinks, or loose connections at least once a year, especially if your appliance is more than five years old.
- Level the appliance. An unlevel Freezer vibrates excessively during operation, accelerating wear on internal components and causing noise and balance errors.
LG Warranty and Service Coverage
LG offers a standard one-year parts and labor warranty on most appliances, with extended coverage on specific components — most notably the 10-year warranty on linear compressors in qualifying refrigerators. If your appliance is still within its manufacturer warranty period, contact LG directly before scheduling an independent repair, as unauthorized service may affect warranty coverage.
For appliances outside the warranty period, LG Appliance Experts provides a 90-day parts and labor warranty on every repair we complete. All replacement parts are genuine LG OEM components sourced directly from LG's authorized parts network.