Defrost Thermostat

Hello Mike, thank you for your question. The most likely issue is with the thermostat or the heater itself. More often the thermostat needs to be replaced. Test the defrost heater and the defrost thermostat. They should read closed for continuity when cold. You can test this with a multi-meter. Also check the motor to be sure its turning and blowing cold air into the fridge from the freezer. I hope this helps!

Hello Carl, Thank you for the question. We suggest testing the Defrost Thermostat. The best way to do this is to remove the thermostat from the refrigerator so you can control the temperature of the sensor. You can let the sensor warm up to room temperature. With the sensor warmed up to room temperature the sensor should read approximately 6.2K Ohms at 68°F. With the thermistor submerged is a glass full of ice water, the sensor should be very close to 32°F which should read approximately 16.3K Ohms. If the values that you are getting are far off from these readings, then the sensor is bad and should be replaced. We hope this helps!

Hello Ryan, Thank you for the question. Yes, a defective Thermostat can cause the temperature to fluctuate. The Thermostat can be tested. The best way to do this is to remove the thermostat from the refrigerator so you can control the temperature of the sensor. You can let the sensor warm up to room temperature. With the sensor warmed up to room temperature the sensor should read approximately 6.2K Ohms at 68°F. With the thermistor submerged is a glass full of ice water, the sensor should be very close to 32°F which should read approximately 16.3K Ohms. If the values that you are getting are far off from these readings, then the sensor is bad and should be replaced. We hope this helps!

Hello Maggie, thank you for your question. The Defrost thermostat is part PS3493212( Item 21) and can be found right by the evaporator( Item 23) and evaporator housing( Item 33). If you need help placing an order, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you. Bonjour Maggie, merci pour votre question. Le thermostat de dégivrage fait partie du PS3493212 (article 21) et se trouve juste à côté de l'évaporateur (article 23) et du boîtier de l'évaporateur (article 33). Si vous avez besoin d'aide pour passer une commande, le service client est ouvert 7 jours sur 7. N'hésitez pas à nous appeler. Nous avons hâte d'avoir de tes nouvelles.

Hello Leannie, thank you for your question. We suggest the thermostat part PS2349827. Hope this helps, good luck with this repair.

Hi David, thank you for reaching out. Based on our understanding of the issue, we would suggest that you check the defrost thermostat, part number PS3493212, as it is most likely faulty and may need to be replaced. The defrost thermostat monitors the temperature of the evaporator coils. When the coils drop below a set temperature, the thermostat contacts close to allow power to flow to the defrost heater during the defrost cycle. In the defrost cycle, the defrost heater melts away any frost that may have accumulated on the evaporator coils. If the defrost thermostat is defective, the thermostat contacts will not close. As a result, the thermostat will not provide power to the defrost heater. We hope this helps!

Hi Charlotte, Thank you for your question. There is a video on our website that you can reference on how to install the defrost thermostat. The refrigerator and the defrost thermostat in the video may not show exactly like the one you have, but it will give you a general idea on how to install the part. You will find the video under part number PS469510. Here is a link to the video, https://www.partselect.com/PS469510-Frigidaire-5303918202-Defrost-Thermostat.htm?SourceCode=15. I hope this helps. Thank you and have a great day!

Hi Charlotte, thank you for your question. The installation is still the same on any model. Here is a video that more closely resembles your model: https://www.youtube.com/watch?v=XnApiqTjoFI. I hope that helps. Good luck with your repair.