LG Refrigerator Defrost Sensor Assembly (LG OEM catalog designation: Controller Assembly) 6615JB2005R, Replaces ACM73919201

Genuine LG refrigerator defrost sensor assembly. It monitors evaporator-coil temperature during defrost operation and includes the defrost sensor, fuse, and wire harness.

Is This the Right Part?

✅ Cross Reference Information

Common Symptoms

• Ice or frost accumulating on the evaporator or rear interior cover
• Fresh-food section warming because airflow is restricted by frost
• Improper or incomplete defrost cycling
• A refrigerator defrost-related error code, when supported by the appliance model
• Cooling performance becoming inconsistent

Check Before Replacing

• Unplug the refrigerator before accessing or testing the assembly.
• Visually inspect the sensor, fuse, harness, connector, and wiring for damage, looseness, or an incorrect connector.
• Check whether frost or ice is obstructing the evaporator and airflow; do not treat frost buildup alone as proof that this assembly has failed.
• With the assembly disconnected and using the applicable service documentation, measure sensor resistance at a specified temperature and compare it with the model’s service-manual values.
• If testing the fuse or sensor, avoid applying power to the disconnected component and do not cut or splice the harness during diagnosis.

Pro Tip

Part Details

Key Features

• Genuine LG OEM refrigerator component
• Defrost sensor, temperature fuse, and wire harness supplied as one assembly
• Senses evaporator-coil temperature to help prevent overheating during defrost
• Used in LG and selected Kenmore refrigerator applications documented for this exact part

Installation Notes

• Unplug the refrigerator and protect any food that may deteriorate while power is off.
• Wear work gloves when working around the evaporator cover and internal refrigerator components.
• Access requires removal of the applicable freezer or refrigerator interior components and evaporator-cover area; follow the appliance-specific service instructions.
• Transfer or position the sensor and harness to match the original routing and connector orientation.
• Restore all removed panels and components before reconnecting power; do not force a connector or modify the harness unless the appliance-specific instructions explicitly require it.

Verified Compatible Models

74039, 79572049112, 79574012410, 79574012411, 79574013410, 79574013411, 79574015410, 79574015411, 79574019410, 79574019411, 79574025410, 79574029410, 79574029411, LFX25991ST, LFX25992ST, LFX31915ST, LFX31915SW, LFX31925SB, LFX31925ST, LFX31925SW, LFX31945ST, LFX31995ST, LFX33975ST, LFXC24726D, LFXC24726S, LFXC24726S/00, LFXC24726S/01, LFXC24726S/02, LFXC24796D, LFXC24796S, LFXS30726B, LFXS30726S, LFXS30726S/00, LFXS30726S/01, LFXS30726S/02, LFXS30726W, LFXS30766D, LFXS30766S, LFXS30796D, LFXS30796S, LFXS32766S, LMX30995ST, LMX31985ST, LSFD2491ST, LSFD2591ST, LSFXC2476D, LSFXC2476S, LSFXC2496D, LSFXC2496S, UPFXC2466S

Fitment reminder: Match the complete appliance model number, including suffix or revision where applicable, before ordering.