Lg Refrigerator LFC22740ST Doesn't shut off

The Defrost Sensor Assembly is an OEM part for LG refrigerators. It plays a critical role in the defrost system by monitoring the temperature of the evaporator coil to ensure that it remains at the optimal temperature to prevent frost buildup. The sensor sends signals to the control board, triggering the defrost cycle when necessary.

Over time, the defrost sensor assembly can fail due to wear and tear, electrical issues, or exposure to moisture and temperature fluctuations. When the defrost sensor malfunctions, it can cause improper defrost cycles, leading to excessive frost buildup, reduced cooling efficiency, or the refrigerator not defrosting at all.

Symptoms of a bad defrost sensor assembly include:

• Excessive frost buildup on the evaporator coils
• Refrigerator or freezer not maintaining the correct temperature
• Increased energy consumption
• Refrigerator not defrosting properly

This OEM LG part is also compatible with Sears/Kenmore.

This refrigerator door gasket creates an airtight seal between the door and cabinet to keep cold air in and moisture out. Replace a worn or torn seal to restore cooling performance, reduce frost, and prevent temperature fluctuations.

• Forms a continuous seal around the door perimeter to minimize air leaks
• Helps maintain proper temperatures and humidity inside the refrigerator
• Common failure signs: gaps, tears, or hardened/warped corners
• Symptoms may include doors not closing flush, condensation or frost buildup, and longer run times

What's included: 1 door gasket assembly Installation notes:

• Unplug the refrigerator before servicing
• Warm the new gasket in hot water or with a hair dryer on low to improve flexibility
• Pull the old gasket from the retainer channel; press the new gasket into the channel, starting at the corners
• Close the door and check for uniform contact all around; re-seat and adjust as needed

This Main PCB Power Control Board Assembly manages the appliance's electronic control and power distribution so cycles run as programmed and functions respond to user commands. Replacing a faulty board restores proper control operation. What it does:

• Regulates power to motors, valves, sensors and user interface circuitry
• Interprets control inputs and runs timed cycles and functions
• Helps prevent erratic behavior caused by failed board components
• Common symptom link: unit won't start, touchpad unresponsive, random resets or error codes indicating control faults

• Disconnect power before accessing electrical components to avoid shock
• Ground yourself and handle the PCB by edges to reduce static risk
• Inspect connectors and harnesses for damage; seat plugs fully during reassembly

This condenser fan motor spins the cooling fan that draws air across the condenser coils and around the compressor. Replacing a weak or seized motor restores proper heat removal so the refrigerator can hold temperature and run more efficiently. What it does:

• Drives the condenser fan to move air through the rear condenser/compressor compartment
• Helps dissipate heat from the refrigerant and protects the compressor from overheating
• Supports stable internal temperatures and efficient cooling performance
• Common symptoms: fan not running, louder rattling/grinding at the back-bottom, hot cabinet sides, warmer-than-normal refrigerator temperatures

• Includes 1 cooling fan motor

• Disconnect power before servicing; pull the unit away from the wall for access
• Remove the rear lower access panel to reach the condenser fan area
• Note wiring and fan-blade orientation; transfer the blade and any mounting hardware from the old motor as needed
• The fan spins freely and airflow direction matches the original before reassembly