How to test the sensor for electrical resistance with 2 temperature guides. There is a lot of misinformation on testing the defrost thermostat. If the defrost thermostat does not have continuity when it reaches the low temperature of its operating range, replace it. The main control board regulates the power supply to all of the refrigerator components, including the defrost system. If the defrost sensor fuse blows, the defrost system will not work, and the refrigerator will not defrost. If the defrost heater assembly is defective, the defrost system will not work, and frost will continue to accumulate on the evaporator coils. To determine if the defrost heater is defective, use a multimeter to test it for continuity. The defrost thermostat monitors the temperature of the evaporator coils. Step-by-step instructions on how to test temperature sensor in a Samsung refrigerator. 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. Join Repair Clinic's VIP email list for 10% off, plus other discounts and tips! To fix a Samsung refrigerator defrost problem, you need to first check the defrost system for faults. The sensor shown in the video is Part # DA32-10104N (PD# PD00026468) but the instructions in the video applies to many different part numbers and models of Samsung refrigerators. If the main control board is defective, it may stop sending voltage to the defrost system. We've got millions of parts, hundreds of brands, and thousands of step-by-step videos— everything you need to find it, fix it and finish the job right. The compressor should turn off and the heater should turn on. Shipping all 7 days! Already ordered? Enter model number to search for the required part specific to your product, Browse our parts categories to select from a variety of parts for your product. The defrost sensor has a fuse to back up the sensor in case the sensor fails. Find the right part for your job at https://partsdr.com/We sell new OEM appliance parts for Whirlpool, Maytag, Kenmore, Amana, Estate, Roper, Frigidaire, Electrolux, Tappan, Westinghouse, Kitchen Aid, Jenn Air, Bosch, LG, Samsung, and more.If you found this video helpful, please click the thumbs up button and leave us a comment below.Connect With Us:Facebook: https://www.facebook.com/PartsDrTwitter: https://twitter.com/parts_drRepair Forum: http://forum.partsdr.com/Blog: https://partsdr.com/blog/Subscribe to our YouTube channel: https://www.youtube.com/channel/UCnl8b14hKqlUHQqaLHpqC7Q?sub_confirmation=1#PartsDr #FinditFixit #Samsung Before replacing the defrost control board, first test the defrost heater and defrost thermostat. The defrost sensor monitors the temperature of the evaporator. If the defrost heater does not have continuity, replace it. If the timer does not send power to the def... rost components or advance out of the defrost cycle within 30 minutes, this indicates that the defrost timer is not advancing. If the defrost sensor fails to shut off the defrost heater, the fuse will blow in order to shut off the defrost heater. Use our step-by-step refrigerator repair guide to learn how to test your defrost thermostat. When the refrigerator stops going through the automatic defrost cycle the refrigerator will not cool properly because the frost will block the air flow on the evaporator coil and cause the cold air to stop circulating. The temperature sensor on the evaporator coil is commonly referred to as a \"defrost sensor\".Tools needed:– MultimeterHow to replace the defrost temperature sensor: https://youtu.be/I_aDS77dY8oReplaces these part numbers: 2030330, AP4979323, PS4138666, EAP4138666Refrigerator model shown in video: RF263BEAESG/AAAppliances break, but repair \u0026 maintenance doesn't need to be difficult. If the defrost timer is not advancing, replace it. To determine if t... he defrost thermostat is defective, use a multimeter to test it for continuity. This video from Sears PartsDirect shows how to troubleshoot problems with your refrigerator's thermistor or temperature sensor if your refrigerator is not cooling at the right temperature. If the defrost thermostat is defective, the thermostat contacts will not close. The temperature sensor is used to monitor the temperature in different areas of refrigerator and freezer including monitoring the temperature on the evaporator coil for the automatic defrost cycle. The defrost control board determines how often to run the defrost cycle. If the defrost timer is defective, it may not advance into the defrost cycle, or it may not send power to the defrost heater during the defrost cycle. Email. The system consist of the control board, defrost timer, heater assembly, sensor with fuse and thermostat. In the defrost cycle, the defrost heater melts away any frost that may have accumulated on the evaporator coils. Control boards are frequently misdiagnosed—before replacing the main control, first test all of the defrost system components. Test mode (manual operation / manual defrost function) • If Energy Saver Key + Fridge Key on the front of panel are pressed simultaneously for 8 seconds , it will be changed to the test mode and all displays on the front of panel will be off. The defrost sensor fuse is not resettable—if the defrost sensor fuse blows, you must replace the defrost sensor. Learn how to test the thermistor to see if it's working. To determine if the... defrost sensor or fuse is defective, use a multimeter to test both the sensor and fuse for continuity. The defrost thermostat is usually located behind the back panel in the freezer section of the refrigerator, and it is usually clipped onto the evaporator coil.Get Social With us!https://www.facebook.com/PartsDrhttps://twitter.com/parts_drhttps://plus.google.com/+PartsDrCheck out our appliance repair forum: http://forum.partsdr.com/Check out our blog: http://partsdr.com/blog/Subscribe to our YouTube channel: http://www.youtube.com/subscription_center?add_user=thepartsdrIf you found this video helpful please click the thumbs up button and leave us a comment below. If either the defrost sensor or fuse does not have continuity, replace the defrost sensor. Hold times are long. If the defrost heater and defrost thermostat are working properly, the defrost control board is likely defective. As a result, the thermostat won’t provide power to the defrost heater. If none of the defrost system components are defective, consider replacing the main control board. The defrost sensor has a fuse to back up the sensor in case the sensor fails. This video shows the proper way to test your defrost thermostat.