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Customer Questions and Answers for Defrost Thermostat by Frigidaire

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    • Part Number: AP2150145
    • MFG Part Number: 5303918214
    • Made by: Frigidaire
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For Frigidaire Defrost Thermostat (Part Number: AP2150145)

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My freezer keeps building up ice on the coils in the back. It seems to work fine for a while after I remove the panel and defrost the ice. It seems to be the exact same problem as was asked about in a previous post (see below). It looks like I need the exact same parts from the response to that post for my model of refrigerator. The questions that I have are about whether I am testing the thermostat and the heating element correctly. The last time that I defrosted the ice off of the coils I put a continuity tester on the thermostat and also on the heating element. Both items had continuity so I thought that they were working fine. However now I am wondering if I needed to put the thermostat in ice water and then test for continuity? I am not sure that the thermostat was very cold when I tested it. Should it be closed and have continuity when cold? Should there be no continuity when the thermostat is warm? Should I be testing the resistance of the heating element instead of just continuity? If yes, how much resistance should the heating element have? I should add that I noticed that the heating element seemed to have dropped down too low in the coil because there was an aluminum "strap" that was broken that appeared to have been holding the heating element up higher at some point. I moved the heating element back up and used what was left of the aluminum strap to hold it up and it seemed to help but the ice just took a little longer to build back up again on the coils. I had a hard time finding the ADC in my refrigerator but I think that I found it on the fridge side in the top left under a plastic cover. I was thinking that the ADC must be bad but now I am questioning myself. I really appreciate your website because it has helped me to narrow down the problem. Now I just want to try and make sure that I figure out correctly which part is the problem so that I can order the correct part. Thank you for any help that you can provide me with. Previous post about freezer problem: My evaporator coils freezes up big block of ice. I defrost it with a blow dryer works good again for a week and it happens again. Any idea whats wrong? Charlie for Model Number frs23r4aw7 Answer Hello Charlie. It sounds like you may have a defrost problem with the unit. Check and see if there is any frost build up on the back wall of the freezer. If so, you will need to test the defrost... more heater 5303918255 and the defrost thermostat 5303918214. They should read closed for continuity when cold. You can test this with a multi-meter TJMA-DMT3. I will include a link at the end to assist you how to use the multi-meter if needed. If both parts are good, you will need to replace the defrost timer 5303918476. Once the problem is repaired, you will need to thaw out the ice on the coils before the unit will operate properly. Hope this helps. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read more: http://www.appliancepartspros.com/frigidaire-thermostat-defrost-5303918214-ap2150145.html#ixzz2BkK6kkVa http://www.appliancepartspros.com

Brett Y for Model Number GLRS264ZAW5 (Electrolux refrigerator)

ANSWER Hello Brett, When you test the defrost bi-metal 5303918214 for continuity you want the bi-metal to be cold. You will not have continuity when it is warm. The defrost heater 5303918255 you would check continuity. If both the heater and defrost thermostat check ok then you would need to replace the ADC 5303918476

Answered by AppliancePartsPros.com   |   Monday, November 19, 2012

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