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Customer Questions and Answers for Refrigerator Temperature Sensor by Frigidaire

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Manufacturer Part
4.89 (64)
By: Frigidaire
Part Number: OEM21729474
Manufacturer Part Number: 240597220

Fixes incorrect temperature readings and short cycling. This thermistor monitors fridge temps and signals the control board. Moderate DIY repair.

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Questions & Answers

For Frigidaire Refrigerator Temperature Sensor (Part Number: OEM21729474)

1 Answer

Hank, the thermistor 240597220 is going to be in the freezer section located on the evaporator cover. The refrigerator thermistor 5303918775 is going to be located on the right side of the refrigerator just behind a square cover 5304508041.

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Frank for Model Number EI28BS56IS1

Hi, I have an Electrolux Frig Model ei28bs56is1 that is running but not colling at all. The compression not running. I checked that there is power of 120 volts going to the invertor. I check the wires that come from the main board and it does have about 5 volts. I checked the winding pins on the compressor and it has continuity between the pins. The Ohms read 16 between each pins. When I check the power to the pins , it seems to be getting 170 volts based on check the power coming from the pin. When I plug in the frig the alarm comes on for high heat and power failure. When I ran the diagnotic test #26 BIMetal Defrost shows up as open. I'm not sure what the problem is.

1 Answer

Frank, If there is power getting to the compressor then this would be a faulty compressor if it is not running.

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Frank for Model Number EI28BS56IS1

Hi, My ELECTROLUX Model EI28BS56IS1 the whole frig is ward. Everything appears to be working except the compressor is not turning on. I did check that the invertor on the compressor is getting power. I also checked the 3 pins on the compressor that there's continuity between all pins and verified that there is no short between each pin testing it to ground. I checked the Ohms between the pins of the compressor and did not get any reading. I'm not sure what the issue might be at this point?

1 Answer

Frank, the compressor windings should have had a resistance when testing the pins and it should have been around 10 Ohms. The lack of a resistance reading would indicate the compressor 5303918411 has failed and it would require an EPA certified technician to repair.

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1 Answer

John, the temperature sensor 240597220 would need to be tested for resistance from the main control after unplugging the refrigerator power cord. At the connection J4A, the wire at pin 3 would be tested to the wire at pin 9 and it should measure 19,869 Ohms at 50°F. It should measure 17,414 Ohms at 55°F, 15296 Ohms at 60°F, and 13,469 Ohms at 65°F. If the sensor tests within range, the main control 241996355 would be the cause of failure.

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1 Answer

Hank, You can test the temperature sensor for a resistance of 5K ohms at room temperature. If the resistance is good then the issue would be a faulty control board and if the resistance is bad then the issue will be the thermistor.

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1 Answer

Bob, Thanks for the question!!! The thermistor may be located behind the evaporator cover in the back of the freezer.

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1 Answer

Christopher, This part would be located at the top of the refrigerator near the controls. It is mounted to the refrigerator temperature sensor mounting bracket.

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1 Answer

Lorenzo, We will need a complete model number that is located on the inside of the refrigerator section to be able to assist with your question.

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1 Answer

Hello Chris, we are unable to find any service information for the exact location of the fresh food temperature sensor in your model. However, it is usually located behind a small square screw-mounted cover with louvers on the face. It may be on the side or rear liner walls usually about mid-way up or near the top area.

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1 Answer

Anwar, Check to make sure that you are getting a good seal around the door. Also, check the floor of the freezer to make sure that there is no ice build up and if there is then clean and flush the drain.

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