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Refrigerator or freezer temperature sensor (also called a thermistor). The thermistor monitors the refrigerator, freezer, and evaporator temperature and sends the temperature reading to the control board.

Refrigerator/ freezer thermistor kit This kit no longer comes with instructions, Take the part number for the Kit and enter it at Servicematters.com for a copy of the instructions.

Temperature sensing thermistor

Temperature sensing thermistor kit with wire connectors for splicing into refrigerator wiring

Harness assembly, temperature/ defrost

Temperature sensor at evaporator in the freezer

Temperature sensing thermistor

Thermistor assembly with long harness. Includes both the freezer and refrigerator thermistors

Temperature sensinging thermistor kit

Thermistor

This is a genuine replacement part. Thermistor 297018400 Frigidaire sensor thermistor

Thermistor assembly

Refrigerator/ freezer thermistor kit This kit no longer comes with instructions, Take the part number for the Kit and enter it at Servicematters.com for a copy of the instructions.

Temperature sensor

Sensor
Repair Clinic stocks genuine OEM Refrigerator Thermistor parts that restore proper function and reliable performance. A faulty sensor or thermostat causes incorrect temperature readings, cycling issues, or error codes. Enter your model number to find the exact Refrigerator Thermistor part you need, with same-day shipping on most in-stock items and a 365-day return policy.
When your refrigerator thermistor fails, symptoms vary by brand and model. Below are the most important questions homeowners ask about refrigerator thermistor replacement.
Wear from age, heat cycles, and electrical stress are the top causes. Contamination and mechanical strain also shorten thermistor life. Genuine OEM parts installed correctly typically restore full function.
Look for a data plate or label on your unit — typical locations include the door frame, back panel, or inside an access panel. Enter your full model number in our search to pull the exact OEM thermistor for your model.
Most thermistor replacements take between 30 minutes and 2 hours depending on the product type and accessibility. Our step-by-step repair videos walk through disconnection, removal, installation, and testing.


Ordering refrigerator thermistor parts online is simple and gives you access to OEM options across every major brand. With same-day shipping on most in-stock items, you'll have your replacement part fast, minimizing downtime. Our model/part number lookup finds the exact OEM part for your unit, and every order is backed by our 365-day return policy and price-match guarantee. Browse our repair help section for troubleshooting tips, part testing guides, and step-by-step installation videos for your specific product.
Check behind the crisper drawer, on the side wall inside the fresh-food compartment, or on the compartment ceiling for your refrigerator's model-number label. Some models place it near the door opening, so remove food or drawers if they block the label. Copy the complete model number exactly, including letters, numbers, and any separators, and do not substitute the serial number. Enter it in the search bar to filter the full catalog to parts that fit your refrigerator model. This works across every associated part category, not just the part you are replacing. With the right model selected, you can compare compatible options quickly and avoid ordering parts based on appearance alone.

Repair Clinic makes Refrigerator repair straightforward with a deep online library of videos, guides, and diagnostic articles. Step-by-step written instructions cover disassembly, testing, and reassembly, and the video library shows the same work in action so you can follow along. Use the model number lookup to confirm the exact OEM part, and wiring diagrams and part testing walkthroughs support the more technical steps.

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A faulty thermistor can cause your refrigerator to run constantly or fail to cool properly. Learn how to test and replace a thermistor with expert repair tips and OEM parts from Repair Clinic.