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. When the bimetal is cold it should show zero resistance or closed. You can tested the bi-metal defrost thermostat with a ohm 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. I cannot find a test for the defrost thermostat, which I believe is the last part of what could possibly be wrong. 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. 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 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. The defrost control board determines how often to run the defrost cycle. This video provides information on how to test a defrost thermostat on a refrigerator. You can test this with a multi-meter. Your freezer does its best to keep a consistent temperature. So I then plugged the When a defrost cycle begins, the metal alloy switches of the defrost heater are triggered by the timer to switch to warm. Also check the motor to be sure its turning and blowing cold air into the fridge from the I would recommend testing the bimetal defrost as well as the defrost heater first. You will have to us a multi-meter to test the defrost thermostat. If the board fails, the refrigerator will not go into the defrost cycle. The switch is normally closed. It needs to be cold in order for you to test it. The wheel or knob control is typically situated inside the refrigerator at the back, while the thermostat is within the appliance How to test the defrost bimetal if is working or not? When the defrost thermostat has closed, short the "test" pins on the board until the reversing valve shifts, indicating 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 Refrigerators contain a built-in thermostat with a control inside the appliance for adjusting the temperature. The seller claimed "this particular thermostat can not be tested as … If the temperature at the thermostat is less than 28 F and the thermostat is open, replace the thermostat. You can test warm and cold as indicated above. 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. Before you begin to test your defrost thermostat, make sure you disconnect the appliance's power supply. 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 replacing the defrost control board, first test the defrost heater and defrost thermostat. Learn more from the experts at Repair Clinic. When the circuit closes again, it will then Clip one of the test leads from your DMM to each terminal on the thermostat. Remove the screws or depress the retainer clips with a small screwdriver. If they are good, then you will need to replace the control board WR55X10942P. Directions for testing a refrigerator defrost thermostat. 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. Get shopping advice from experts, friends and the community! You need the defrost bi-metal switch to stay cold. Step by step instructions on how to replace a Defrost Thermostat #WR50X122 for Refrigerator made by GE, Kenmore. Note: This video is intended to give you the general idea of the part replacement procedure. A defrost thermostat is part of a refrigerator. Note: This video is intended to give you the general idea of the I found the defrost thermostat (which is wired with easy connectors in series to the defrost heater) I did a room temp test and test in ice water on the defrost thermostat and it remained open both times. A thermistor changes resistance based on the temperature it is exposed to. Use our step-by-step refrigerator repair guide to learn how to test your defrost thermostat. This is Americana model #A3309. How to Test the Defrost Thermostat continued from page 1 The panel may be held in place by retainer clips or screws. Hi Thomas , Thank you for the question. If you find that you have a bad defrost heater, … On a defrost thermostat you can also easily jump it out to test the board since it is just open and closed. 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. Defrost Thermostat - Frigidaire 5303918202 - The thermostat senses that the heat near the cooling coils has reached the desired temperature. 2. Your appliance may What you will have to do first is calibrate your multi-meter. You can test the Defrost Thermostat with a multi-meter. It is usually located at the back of a side by side freezer or under the floor of a top freezer. After replacing the timer, the refrigerator still won't cool and the vent keeps icing up. A defrost “sensor” is generally a thermistor. However the result is failed. Test the defrost heater and the defrost thermostat. 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. The defrost thermostat is located near the defrost heater and is wired in series. Note: Do not totally defrost the evaporator coils. Directions for testing a refrigerator defrost thermostat. Get shopping advice from experts, friends and the community! Hello Ken, thank you for your question. The should read closed for continuity when cold. How To Test the Defrost Thermostat S ome defrost systems use a thermostat (a bi-metal switch) to prevent the defrost heater from overheating. But if the defrost thermostat has shorted or become broken, your freezer can’t regulate its own temperature anymore. You can test the defrost board by seeing if you have power coming from the red wire on it. Set it all the way to its Hello Joe, Thank you for the question. Then go to the air baffle and see if you have voltage coming out of the red/white wire on it. This allows them to be heated for short periods of time to dispose of frost, without heating the contents of the freezer . 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. The defrost bi-metal switch contact is closed when it is cold, and open when it is 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. You can test the heater and I have recently bought a defrost thermostat 12001937 on line and did a Continuity test right away. I followed exactly as instructed on YouTube from RepairClinic (URL attached). The easiest way to do this is to unplug the unit from the wall. I checked the element is for continuity and got a reading of 80 ohms. You will want to test the defrost thermostat and the defrost heater for continuity. They should read closed for continuity when cold. 6. Before you begin to test your defrost thermostat, make sure you disconnect the appliance's power supply. The thermostat sends power to the defrost board Step by step instructions on how to replace a Defrost Thermostat #5303918214 for Refrigerator made by Frigidaire, Gibson, White Westinghouse, Electrolux, Kenmore. The easiest way to do this is to unplug the unit from the wall. Yes there is a way to test the thermostat . You will need to test the heater WR51X10055 and defrost thermostat. 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