A thermistor is an essential component of your LG refrigerator’s cooling system. It measures the temperature inside the refrigerator and sends the information to the control board, allowing it to regulate the cooling process. Over time, a thermistor can start to malfunction, leading to issues such as inaccurate temperature readings or failure to cool properly. Testing the thermistor is a crucial step in troubleshooting and diagnosing the problem. In this step-by-step guide, we will walk you through the process of testing the thermistor on your LG refrigerator, helping you identify and resolve any issues.
Identifying the Thermistor in Your LG Refrigerator
Before you start testing the thermistor, it’s important to locate its position within the refrigerator. In most LG refrigerator models, the thermistor is located near the evaporator coil, which is typically found inside the freezer compartment. To access the evaporator coil and thermistor, you may need to remove the freezer’s back panel or other covers.
Gathering the Necessary Tools and Equipment
To effectively test the thermistor on your LG refrigerator, you will need a few tools and equipment. These include a digital multimeter, a small screwdriver, and a pair of needle-nose pliers. These tools will help you accurately measure and assess the resistance of the thermistor, determining whether it is functioning correctly or not.
Ensuring Safety Measures
Before you begin testing the thermistor, it is essential to prioritize safety. Start by unplugging your refrigerator from the power source to avoid any electrical risks. Additionally, wear protective gloves to prevent any injuries during the process.
Testing the Thermistor
Now that you have identified the thermistor and gathered the necessary tools while ensuring safety, it’s time to move on to the testing process. The following steps will guide you through the process:
Step 1: Accessing the Thermistor
As mentioned earlier, the thermistor is typically located near the evaporator coil inside the freezer compartment. Depending on your LG refrigerator model, you may need to remove the freezer’s back panel or other covers to access it. Using the small screwdriver, carefully remove any necessary screws or clips that hold the cover in place.
Step 2: Removing the Thermistor
Once you have gained access to the thermistor, proceed to remove it from its position. Most thermistors are connected by a wire harness or clip. Use your needle-nose pliers to carefully disconnect the wires or remove the clip, allowing you to remove the thermistor from its mounting bracket.
Step 3: Testing the Thermistor with a Multimeter
Now that the thermistor is detached from its position, it’s time to test it with a multimeter. Set the multimeter to the resistance or ohms setting. Connect the multimeter’s probes to the thermistor’s terminals. Make sure the probes have a secure connection. The multimeter will display a resistance reading.
Step 4: Interpreting the Resistance Reading
The resistance reading you obtain from the multimeter will determine the functioning of the thermistor. A functioning thermistor typically displays resistance as the temperature changes. However, if the resistance reading remains steady or displays as open/OL or infinite, it indicates a faulty thermistor that needs replacement.
Replacing a Faulty Thermistor
If you have determined that your LG refrigerator’s thermistor is faulty, you will need to replace it with a new one. Here’s a step-by-step guide on how to replace a faulty thermistor:
Step 1: Obtaining the Correct Replacement Thermistor
Before you proceed to replace the faulty thermistor, make sure to obtain the correct replacement part. Check your refrigerator’s model number and search for the compatible thermistor by referring to the LG refrigerator’s user manual or contacting the manufacturer.
Step 2: Removing the Old Thermistor
To remove the old thermistor, disconnect any wire harness or clips connecting it to the refrigerator. Gently pull the thermistor out from its mounting bracket.
Step 3: Installing the New Thermistor
Insert the new thermistor into the mounting bracket, ensuring a secure fit. Reconnect any wire harness or clips that were previously disconnected, ensuring they are properly attached.
Step 4: Testing the New Thermistor
After replacing the faulty thermistor with the new one, repeat the testing process outlined earlier using the multimeter. This will allow you to confirm that the new thermistor is functioning correctly.
Final Thoughts
Testing the thermistor on your LG refrigerator is a vital step in diagnosing and resolving any cooling system issues. By following the step-by-step guide provided, you can effectively identify whether the thermistor is faulty and needs replacement. Remember to always prioritize safety by unplugging the refrigerator before testing or replacing any components. By taking the necessary measures and following the outlined steps, you can maintain your LG refrigerator’s optimal performance and extend its lifespan.