LG Refrigerator Error Code CL — Low-Side Refrigerant Leak (Cycle Leakage)
What this means
The CL error code on LG refrigerators indicates a suspected refrigerant leak on the low-pressure side of the sealed refrigeration system. CL stands for 'Cycle Low' and means the evaporator temperature readings are abnormal, suggesting refrigerant may be escaping from the evaporator coils, suction line, or related low-side components. The freezer and refrigerator compartments will struggle to maintain proper temperatures. The evaporator may develop uneven frost patterns — one section frosted and another bare — which is a visual indicator of low refrigerant. This error requires professional sealed-system repair. Note: This is different from the CL 'Child Lock' indicator found on some LG models.
Alternate codes: E CL, Er CL
Step-by-step fix
4 stepsConfirm it is not a Child Lock indicator
On some LG models, CL can also indicate the Child Lock feature is active. Check if the CL display is accompanied by a lock icon. If so, press and hold the Lock button for 3 seconds to deactivate. If CL appears with a temperature warning or flashing, it is the refrigerant leak code.
The Child Lock CL typically appears only when buttons are pressed. The refrigerant CL error appears continuously with abnormal temperatures.
Check compartment temperatures
Monitor the refrigerator and freezer temperatures. If the freezer cannot reach 0 °F or the refrigerator cannot reach 37 °F, this supports a refrigerant issue. Move perishable food to another refrigerator or cooler.
Use a standalone thermometer placed in a glass of water in the refrigerator for an accurate reading — the display sensor may itself be affected.
Inspect the evaporator for uneven frost
Remove the freezer back panel (interior panel behind the shelves) to expose the evaporator coils. Look for uneven frost patterns — a partially frosted evaporator with bare spots strongly indicates low refrigerant.
Photograph the frost pattern to show the technician — it helps them pinpoint the leak location.
Contact a sealed-system technician
A CL refrigerant error requires a certified sealed-system technician to locate and repair the leak, then recharge the system with the correct refrigerant (typically R-600a). Check your LG warranty — many models include a 10-year linear compressor and sealed-system warranty.
Have your model number, serial number, and purchase date ready when contacting LG for warranty service.
When to call a professional
Immediately. A CL refrigerant leak error cannot be repaired at home and requires an EPA-certified sealed-system technician. Check LG's 10-year compressor warranty coverage for your model.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Evaporator Assembly
Part #ACG73624806 · $150–$350
If the evaporator is the source of the refrigerant leak
Refrigerant Recharge (R-600a)
Part #Service-only · $200–$400 (service call)
Required after leak repair to recharge the sealed system
Links may earn us a commission at no extra cost to you. We only recommend parts relevant to this repair.