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10 LG Refrigerator Parts That Commonly Fail And How to Replace Them

Author : Noah Liam | Published On : 23 Jun 2026

LG refrigerators are known for their advanced cooling technology and long-lasting performance, but like any home appliance, they depend on multiple components that can wear out over time. When issues arise, many homeowners experience problems such as inconsistent cooling, unusual noises, water leakage, or even an LG refrigerator not cooling but running despite the unit being powered on. These issues are often linked to specific LG refrigerator parts that gradually fail due to regular usage, temperature fluctuations, and electrical conditions. Accessing reliable LG appliance parts Canada suppliers helps ensure you get the right replacements when these problems occur. Understanding these components and their role in the system helps in identifying faults early and choosing the right LG replacement parts. In this guide, we will explore 10 commonly failing parts, explain their function, and outline how they can be replaced to restore efficient cooling and reliable refrigerator performance.

LG Refrigerator Main Control Board (PCB)

The Problem: 

The main control board is responsible for managing all cooling, defrosting, and electrical operations. When it fails, the refrigerator may run but not cool properly, show error codes, or become completely unresponsive. In some cases, users may notice an LG refrigerator not cooling but running due to incorrect signals sent to the compressor or fans.

How to Replace:

  • Unplug the refrigerator from power

  • Locate the rear control board panel

  • Remove screws and open the cover

  • Take a photo of all wiring connections

  • Disconnect all harnesses carefully

  • Unscrew and remove the faulty PCB

  • Install new LG appliance parts Canada control board

  • Reconnect all wires correctly

  • Secure the panel and restore power

  • Check operation after restart

LG Refrigerator Evaporator Fan Motor

The Problem: 

The evaporator fan motor circulates cold air from the freezer to the refrigerator section. If it fails, the freezer may stay cold, but the fridge becomes warm, often leading to LG refrigerator not cooling but running complaints. Ice buildup or unusual noises may also occur due to restricted airflow.

How to Replace:

  • Unplug refrigerator

  • Remove freezer shelves and stored items

  • Unscrew inner rear panel

  • Disconnect fan wiring harness

  • Remove mounting screws from fan motor

  • Take out old evaporator fan motor

  • Install new LG refrigerator parts motor

  • Reconnect wiring securely

  • Reassemble panel and shelves

  • Restore power and test airflow

LG Refrigerator Condenser Fan Motor

The Problem: 

The condenser fan motor cools the compressor and condenser coils. When it fails, the refrigerator may overheat, run continuously, or lose cooling efficiency. This issue is common in aging LG parts systems and can indirectly lead to LG refrigerator not cooling but running continuously due to heat buildup around the compressor.

How to Replace:

  • Unplug refrigerator and pull away from wall

  • Remove lower rear access panel

  • Locate condenser fan assembly

  • Disconnect electrical wiring

  • Unscrew mounting bracket

  • Remove faulty fan motor

  • Install new LG replacement parts motor

  • Reconnect wiring properly

  • Secure bracket and reattach panel

  • Restore power and verify cooling performance

LG Refrigerator Thermistor (Temperature Sensor)

The Problem: 

The thermistor measures internal temperature and sends data to the control board. If it malfunctions, the refrigerator may overcool, undercool, or cycle incorrectly. This can cause confusion in LG appliance parts Canada systems, sometimes resulting in an LG refrigerator not cooling but running even though all components appear operational.

How to Replace:

  • Unplug refrigerator

  • Locate thermistor inside fridge or freezer walls

  • Remove protective cover if present

  • Disconnect wiring connector carefully

  • Unclip old sensor from mounting point

  • Remove faulty LG refrigerator parts thermistor

  • Install new sensor in same position

  • Secure clip firmly

  • Reconnect wiring

  • Restore power and monitor temperature accuracy

LG Refrigerator Defrost Heater and Bi-Metal Thermostat

The Problem: 

These components prevent frost buildup on evaporator coils. If they fail, ice accumulates and blocks airflow, reducing cooling efficiency. This often leads to LG refrigerator not cooling but running situations where the compressor operates but airflow is restricted.

How to Replace:

  • Unplug refrigerator

  • Remove freezer contents and shelves

  • Unscrew rear inner panel

  • Expose evaporator coil assembly

  • Disconnect heater and thermostat wiring

  • Unclip both components from coils

  • Remove faulty LG replacement parts

  • Install new heater and thermostat

  • Secure components tightly on coils

  • Reconnect wiring and reassemble panel

  • Restore power and check defrost cycle

LG Refrigerator Water Inlet Valve

The Problem: 

The water inlet valve controls water flow to the ice maker and dispenser. When faulty, it may cause leaks, no ice production, or weak water flow. In some cases, electrical issues in LG parts systems may affect overall refrigerator performance.

How to Replace:

  • Turn off water supply

  • Unplug refrigerator

  • Pull unit away from wall

  • Remove rear lower panel

  • Disconnect water lines carefully

  • Disconnect electrical connectors

  • Unscrew valve assembly

  • Remove faulty LG appliance parts Canada valve

  • Install new inlet valve

  • Reconnect water lines and wiring

  • Check for leaks after restart

LG Refrigerator Water Filter

The Problem: 

A clogged water filter restricts water flow and affects ice and water quality. While not directly linked to cooling, neglecting filter replacement can impact overall LG refrigerator parts efficiency and system performance.

How to Replace:

  • Open filter compartment

  • Turn filter counterclockwise

  • Pull out old filter

  • Insert new LG replacement parts filter

  • Rotate clockwise to lock

  • Flush water dispenser for 3–5 minutes

  • Check for smooth water flow

  • Ensure no leaks at housing

  • Reset filter indicator if available

  • Regular replacement improves performance

LG Refrigerator Door Gasket

The Problem: 

The door gasket seals cold air inside the refrigerator. If damaged or loose, cold air escapes, forcing the system to work harder and contributing to LG refrigerator not cooling but running issues due to loss of internal temperature stability.

How to Replace:

  • Open refrigerator door

  • Peel off old gasket slowly

  • Clean gasket groove thoroughly

  • Align new LG refrigerator parts gasket

  • Press firmly into channel

  • Ensure all corners fit tightly

  • Close door to check seal

  • Adjust alignment if needed

  • Allow gasket to settle

  • Test for proper suction and cooling retention

LG Refrigerator Ice Maker Assembly

The Problem: 

The ice maker assembly produces and dispenses ice. When it fails, ice production stops or becomes inconsistent. While not always linked to cooling, malfunctioning LG appliance parts systems may affect overall performance balance.

How to Replace:

  • Remove ice bin

  • Unplug refrigerator

  • Disconnect ice maker wiring

  • Unscrew mounting bolts

  • Remove faulty ice maker

  • Install new LG replacement parts assembly

  • Secure screws tightly

  • Reconnect wiring harness

  • Replace ice bin

  • Restore power and allow cycle completion

LG Refrigerator Compressor Start Relay and Overload

The Problem: 

The start relay and overload protector help the compressor start and prevent overheating. If faulty, the compressor may click repeatedly or fail to start, leading to no cooling even though the refrigerator runs. This is a common issue in LG appliance parts systems and may resemble LG refrigerator not cooling but running symptoms.

How to Replace:

  • Unplug refrigerator

  • Remove lower rear panel

  • Locate compressor assembly

  • Pry off old start relay

  • Disconnect wiring carefully

  • Remove overload protector

  • Install new LG replacement parts relay

  • Push onto compressor pins

  • Reconnect wiring

  • Reassemble panel and restore power

  • Confirm compressor starts properly

Conclusion: Keeping Your LG Refrigerator Running Efficiently

Keeping an LG refrigerator running efficiently depends on timely maintenance, proper care, and replacing worn-out components with quality LG refrigerator parts. Issues such as inconsistent cooling or an LG refrigerator not cooling but running are often early signs of failing components that should not be ignored. Using reliable LG replacement parts ensures stable performance, energy efficiency, and longer appliance life. Regular inspection of fans, sensors, seals, and electrical components helps prevent unexpected breakdowns. Whether sourcing LG appliance parts Canada or from other trusted suppliers, choosing genuine LG parts is essential for maintaining consistent cooling and dependable refrigerator operation over time.

 

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