LG Freezer Too Cold
Quick answer: A freezer that runs far below 0°F (-18°C), freezes items rock hard, and frosts packages is usually the result of a control problem rather than a cooling problem.
- Unplug the refrigerator before testing any sensor or control.
- Handle frozen packages carefully; the edges of frosted items can cut.
- Do not chip at ice on the evaporator with tools; it can puncture the coil.
Why is my freezer too cold?
A freezer that runs far below 0°F (-18°C), freezes items rock hard, and frosts packages is usually the result of a control problem rather than a cooling problem. Common causes are a temperature control set too low, a faulty thermistor or thermostat that never signals the compressor to stop, a stuck damper, or a control board that keeps the compressor running.
Our fitment data covers 1,515 LG refrigerator models and 3,032 LG refrigerator parts, so the part links below are filtered to this brand; always confirm your model number before ordering.
Most Likely Causes, in Order
1. Temperature control thermostat
A cold control that sticks closed keeps the compressor running no matter how cold the freezer gets.
How to check: Turn the control to a warmer setting and wait 24 hours. If the temperature does not change, unplug the unit and test the control for continuity at both extremes; it should open at the warm setting.
Fix: Replace the temperature control thermostat. (Difficulty: Moderate)
No LG part for this cause is in our catalog yet; search by your model number.
2. Thermistor
A thermistor with drifted resistance tells the control board the freezer is warmer than it is, so the compressor never stops.
How to check: Unplug the unit, disconnect the sensor, and measure its resistance with a multimeter. Compare against the value on the tech sheet inside the unit; a reading far off at room temperature means it has failed.
Fix: Replace the thermistor. (Difficulty: Moderate)
Matching LG parts:
- Refrigerator Temperature Sensor 6500JB2001B — $25.87 – $49.39 · 888 models
- Refrigerator Temperature Sensor 6500JB2002X — $22.66 – $43.68 · 536 models
- Refrigerator Freezer Temperature Sensor Cover 3550JA3095A — $17.99 · 22 models
3. Air damper control
On many models the damper regulates how much freezer air flows to the fresh-food side; if it sticks, the balance between compartments goes wrong and the freezer overcools.
How to check: Find the damper where air enters the refrigerator section and watch it while changing the setting. A flap that never moves, or is frozen open or closed, is faulty.
Fix: Thaw the damper; if it still does not respond, replace the damper assembly. (Difficulty: Moderate)
No LG part for this cause is in our catalog yet; search by your model number.
4. Main control board
A failed compressor relay on the control board can keep the compressor energized continuously.
How to check: Rule out the thermistor and damper first. If the compressor runs nonstop even with the control turned to warmest, and the sensor reads correctly, the board is the likely cause. Look for burnt spots on the board.
Fix: Replace the main control board. (Difficulty: Advanced)
No LG part for this cause is in our catalog yet; search by your model number.
Other LG parts the catalog tags for this symptom
- Refrigerator Defrost Sensor Assembly 6615JB2005C — $41.84 – $54.95 (overheating; temperature too cold; temperature too hot; won')
- LG Refrigerator Compressor TCA35931726 — $272.31 – $351.78 (fridge warm; loud noise; not cooling)
- Refrigerator Compressor TCA35893203 — $554.30 – $786.47 (fridge warm; loud noise; not cooling)
- LG Refrigerator Compressor TCA36811409 TCA36811409 — $390.26 – $487.91 (fridge warm; loud noise; not cooling)
- Refrigerator Compressor 2521C-A5719 — $477.24 – $560.22 (fridge warm; loud noise; not cooling)
- Compressor - Refrigerator Cooling System Part by LG TCA38151706 — $390.26 – $617.14 (fridge warm; loud noise; not cooling)
Popular LG refrigerator models
Confirm the model number on the rating plate before ordering. Each model page lists every compatible part.
Frequently Asked Questions
What temperature should the freezer be?
0°F (-18°C). A few degrees colder does no harm, but -10°F (-23°C) or lower wastes energy and points to a control fault.
Can a freezer that is too cold make the refrigerator too warm?
Yes, on single-compressor models. If cold air is not being shared properly through the damper, the freezer may overcool while the fridge warms.
Why did it start after a power outage?
Some electronic controls reset to default settings or are damaged by a surge; check the settings first, then the thermistor and the board.
When to Call a Professional
Call a technician if the compressor keeps running with the control at the warmest setting and the thermistor and damper both test good; diagnosing a control board without a wiring diagram risks replacing the wrong part.