Note: This video is intended to give you the general idea of the part replacement procedure. NOTE : If you’re not familiar in using a multi-meter or feel safe and comfortable in checking live voltages I highly recommend calling a service technician to diagnose and repair your refrigerator. Yes there is a way to test the thermostat . You will have to us a multi-meter to test the defrost thermostat. Troubleshooting a defrost thermostat is probably a job for the professional, but if you wish to have a go, then you can, assuming that you have some basic knowledge of how fridges work, and can follow some simple ideas to This allows them to be heated for short periods of time to dispose of frost, without heating the contents of the freezer . Get shopping advice from experts, friends and the community! What you will have to do first is calibrate your multi-meter. The defrost thermostat can be tested by inserting the red probe in the white/pale green wire to the left.Black probe stays in the middle slot.Warm, it will be open (no continuity) and cold, it will be closed (continuity). I then contact the seller. When the defrost thermostat has closed, short the "test" pins on the board until the reversing valve shifts, indicating A defrost thermostat opens the heater circuit when the evaporator temperature rises above a preset temperature, 40 F (5 C) or more, thereby preventing excessive heating of the freezer compartment. Clip one of the test leads from your DMM to each terminal on the thermostat. Hello Ken, thank you for your question. Get shopping advice from experts, friends and the community! If they are good, then you will need to replace the control board WR55X10942P. When a defrost cycle begins, the metal alloy switches of the defrost heater are triggered by the timer to switch to warm. If the board fails, the refrigerator will not go into the defrost cycle. I have recently bought a defrost thermostat 12001937 on line and did a Continuity test right away. When the bimetal is cold it should show zero resistance or closed. They should read closed for continuity when cold. Let the heat pump defrost itself if it’s only covered with thin ice. Heat pumps come with a built-in defrosting component that allows them to melt off accumulating frost during cold weather. Before you begin to test your defrost thermostat, make sure you disconnect the appliance's power supply. 6. The defrost thermostat is located near the defrost heater and is wired in series. Refrigerators contain a built-in thermostat with a control inside the appliance for adjusting the temperature. If the temperature at the thermostat is less than 28 F and the thermostat is open, replace the thermostat. You can test this with a multi-meter. Part of its freezing cycle includes a heater that stops the temperature from getting too cold or stops frost from building up in your appliance. But if the defrost thermostat has shorted or become broken, your freezer can’t regulate its own temperature anymore. The wheel or knob control is typically situated inside the refrigerator at the back, while the thermostat is within the appliance I cannot find a test for the defrost thermostat, which I believe is the last part of what could possibly be wrong. Bi-Metal Defrost Thermostat - Whirlpool WPW10225581 - If you have ice building up in your freezer, or if your freezer is getting too warm during the defrost... My Whirlpool side by side (model #gs6shaxms00) is not staying cool. You can test warm and cold as indicated above. Hi Thomas , Thank you for the question. I followed exactly as instructed on YouTube from RepairClinic (URL attached). 25.09.2018 25.09.2018 4 Comments on Defrost Termination Thermostat Wiring Diagram I verified power to through the defrost heater, and was preparing to replace the termination thermostat. Note: This video is intended to give you the general idea of the Defrost Thermostat - Frigidaire 5303918202 - The thermostat senses that the heat near the cooling coils has reached the desired temperature. I checked the element is for continuity and got a reading of 80 ohms. 2. It is usually located at the back of a side by side freezer or under the floor of a top freezer. You can test the heater and If the pump is covered only with a layer of frost or with less than 1 ⁄ 16 inch (0.16 cm) of ice, it can defrost itself. Step by step instructions on how to replace a Defrost Thermostat #5303918214 for Refrigerator made by Frigidaire, Gibson, White Westinghouse, Electrolux, Kenmore. How to Troubleshoot & Replace Frigidaire AP4374171 / 297216600 Defrost Thermostat Honest and unbiased advice from your neighbors - see how easy it is to troubleshoot, repair, and replace Frigidaire AP4374171 Remove the screws or depress the retainer clips with a small screwdriver. You can tested the bi-metal defrost thermostat with a ohm meter. You can test the defrost board by seeing if you have power coming from the red wire on it. If you find that you have a bad defrost heater, … How to Test the Defrost Thermostat continued from page 1 The panel may be held in place by retainer clips or screws. A defrost thermostat is part of a refrigerator. The seller claimed "this particular thermostat can not be tested as … The should read closed for continuity when cold. However the result is failed. Directions for testing a refrigerator defrost thermostat. How To Test the Defrost Thermostat S ome defrost systems use a thermostat (a bi-metal switch) to prevent the defrost heater from overheating. Your appliance may The defrost control board determines how often to run the defrost cycle. A defrost “sensor” is generally a thermistor. You will need to test the heater WR51X10055 and defrost thermostat. The defrost heater will be located below the evaporator coils and the bi-metal thermostat will be located clipped to the upper left hand or upper right hand corner of the evaporator coils. I would recommend testing the bimetal defrost as well as the defrost heater first. Use our step-by-step refrigerator repair guide to learn how to test your defrost thermostat. The thermostat sends power to the defrost board You need the defrost bi-metal switch to stay cold. Hello Joe, Thank you for the question. Learn more from the experts at Repair Clinic. If your defrost heater has a defrost thermostat wired in series like mine, you’ll need to make sure the thermostat has cooled down below its closing temperature before doing the ohm test. You will want to test the defrost thermostat and the defrost heater for continuity. A thermistor changes resistance based on the temperature it is exposed to. Set it all the way to its Then go to the air baffle and see if you have voltage coming out of the red/white wire on it. Test the defrost heater and the defrost thermostat. This is Americana model #A3309. The multi-meter will display 0.000 if the Defrost Thermostat is in the closed position, and should be in the closed position when it is cold. Note: Do not totally defrost the evaporator coils. You can test the Defrost Thermostat with a multi-meter. How to test the defrost bimetal if is working or not? When the circuit closes again, it will then So I then plugged the Step by step instructions on how to replace a Defrost Thermostat #WR50X122 for Refrigerator made by GE, Kenmore. The easiest way to do this is to unplug the unit from the wall. On a defrost thermostat you can also easily jump it out to test the board since it is just open and closed. Your freezer does its best to keep a consistent temperature. Directions for testing a refrigerator defrost thermostat. After replacing the timer, the refrigerator still won't cool and the vent keeps icing up. The easiest way to do this is to unplug the unit from the wall. The defrost bi-metal switch contact is closed when it is cold, and open when it is The switch is normally closed. It needs to be cold in order for you to test it. Also check the motor to be sure its turning and blowing cold air into the fridge from the This video provides information on how to test a defrost thermostat on a refrigerator. 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