This part is located at the bottom of the evaporator. The defrost heater heats the evaporator in the defrost mode of operation to keep the cooling coils from frosting over. The thermostat must be replaced when replacing the defrost heater.
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★★★★★
★★★★★
Peter C - November 9, 2021
Verified Purchase
Part arrived timely and went in easy
Parts were exact match and freezer is back up and running hopefully for another 20 yeard.
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Brian
May 14, 2019
My freezer dose not defrost automatically, it runs perfect for about 10 weeks and then I have to defrost it manually, what is the most likely cause of this.
For model number 253.44753110
Hello Brian, Thank you for the question. I suggest testing the Defrost Thermostat, PartSelect Number PS2350702. 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. You can also test the Heater, The heater should have resistance and not open (o-ohms). Hope this helps!
Is there a way to test the defrost heater? Is it possible for it to get too hot? My freezer seems to get too hot when it goes into the defrost cycle
For model number FFU21F5HWG
Hi Cindy,
Thank you for your question. You will need to test the defrost heater with a multimeter. Here is a link to one of our videos on YouTube that you may use a general reference on how to use one, https://www.youtube.com/watch?v=bWC44fHn0As. If the defrost thermostat was not working correctly, then the heater would get hotter. The reason for this is the thermostat instead of faulting to the open position, would remain closed. I hope this helps. Thank you and have a great day!
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Bob
February 7, 2022
Freezer constantly runs replaced defrost thermostat worked good for about a month. Is it the heater strip or control panel ?
For model number LFFH21F7HWD
Hello Bob, Thank you for your inquiry. You can test the heater with a multimeter to see if it is causing the issue. If you are unfamiliar with how a multimeter functions, we have videos available to assist you. We would also recommend checking the thermistor and the run capacitor. If those parts test well for continuity, then replace the control board. We hope this helps and 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!
Stand up freezer. Icing up terribly on top of inner part of freezer by the electronics. I check the seal/gasket on the door and its fine. Temp is good, just the ice is icing up after 2 or 3 days.
I have replaced the defrost thermostat and it didnt help anything.
For model number EI32AF80QS
Hello Z, thank you for the question. Based on the description that you have provided, we would recommend checking the defrost heater, part number PS426768, to fix the issue. The defrost heater is used for the prevention of ice buildup on freezer and evaporator coils. We hope this solves your problem!
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Joseph
September 16, 2021
I have this Frigidaire freeze model (FKFH21F7HWB) and I am having problems with the defrost heater not coming on and defrosting the coil as normal every so many hours. I checked the defrost thermostat on the coil and it seems to be working well. I check the heater and it is reading 37 ohms. I am not sure how to make the freeze go into defrost mode, because it has a digital panel on the front of the door. The freezer works very well besides that. Once the coil freeze up the temp will start to drop and I have to unplug the freezer, let the coil defrost and it will work well until it freezes up again. I would appreciate any help on finding out what could be the problem and my next step. Thanks
For model number FKFH21F7HWB
Hello Joseph, Thank you for the question. The Defrost Cycle is controlled by the Control Board for the appliance. It can not be manual put into defrost cycle. The board would need to be replaced. We hope this helps!
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