Replacing the element in this unit is not very difficult. You can test this with a multi-meter TJMA-DMT3. The wires are connected with slip on connectors. 1 Know the resistance of the element should be this can be calculated using known values: X Research source R = (V x V) / P [Where V is the voltage powering the element, P is the power the element uses and R is the resistance.] Before you can test your defrost heater, you have to remove it from your refrigerator. It sounds like you may have a defrost problem with the unit. The defrost heater is a commonly replaced part on a fridge that isn’t cooling properly. Before testing the defrost heater, unplug the refrigerator to avoid an electrical shock hazard. It will be necessary to remove obstructions such as the contents of the freezer, freezer shelves and icemaker to get to the heater. Because of the number of different elements we cannot tell what your reading should be, but we can be certain of what it shouldn't be. You may get a reading between those extremes and the element may still be bad, you can only be certain if you know the correct rating of your element. Firmly grasp these connectors and pull them off the terminals. Refrigerator not defrosting? There are three primary types of defrost heater elements; exposed metal rod, metal rod covered with aluminum tape or a wire coil inside a glass tube. The multitester should display a reading somewhere between zero and infinity. Test the heating element for continuity using a multitester. If the connectors are corroded they should be replaced. Already ordered? Also, inspect the element as it may be labeled. The defrost timer in this model is located in the control housing in the fridge section. This video provides information on how to test a defrost heater on a refrigerator. I would recommend first placing this unit into the defrost cycle manually. Email. This may save you a lot of time and unnecessary work. DISCLOSURE: This post may contain affiliate links, meaning when you click the links, we may receive a commission. Join Repair Clinic's VIP email list for 10% off, plus other discounts and tips! This video provides information on how to test a defrost heater on a refrigerator. You may need to use a pair of needle-nose pliers to remove the connectors. To determine if the defrost heater is defective, use a multimeter to test it for continuity. All three elements are tested in the same way. Removal of that molding can be tricky - never force it. Set the multitester to the ohms setting X1. Warm it first with a warm, wet bath towel this will make it less brittle and a little more pliable. (An example calculation is shown in the tips section) Check and see if there is any frost build up on the evaporator coils in the freezer. 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. You may need a pair of needle-nosed pliers to help you. The panel may be held in place by retainer clips or screws. Other commonly replaced parts when the freezer is cold but the refrigerator is warm are: Place a probe on each terminal. Copyright © 2000 - 2020, Acme Parts.com, Inc. All rights reserved. Contact us to obtain. Start doing it yourself with the confidence that comes with 100+ years of experience. The defrost heater is usually located at the back of a side by side freezer or under the floor of a top freezer. How To Test the Defrost Heater. Shipping all 7 days! The heater is connected by two wires. Remove the screws or depress the retainer clips with a small screwdriver. Caution: Please read our safety information before attempting any testing or repairs. They should read closed for continuity when cold. The defrost heater is a commonly replaced part on a fridge that isn’t cooling properly. A defrost heater is connected by two wires, and the wires are connected with slip-on connectors. Do not pull on the wires themselves. If the reading is zero or infinity the heating element is definitely bad and should be replaced. If the defrost heater assembly is defective, the defrost system will not work, and frost will continue to accumulate on the evaporator coils. It will be necessary to remove obstructions such as the contents of the freezer, freezer shelves and icemaker to get to the heater. Firmly pull the connectors off of the terminals (do not pull on the wire). To test the defrost heater you’ll need to use a @multimeter to do an ohm test. If you have an @autoranging multimeter, then turn it to the home setting. On some older top freezers it is necessary to remove the plastic molding to access the freezer floor. Hold times are long. Inspect the connectors and the terminals for corrosion. When making this check, the freezer temperature must be below 15 degrees. If the defrost heater does not have continuity, replace it. ... Test the heating element for continuity using a multitester. If you decide to remove it, you do so at your own risk - it is prone to breakage. T he defrost heater is usually located at the back of a side by side freezer or under the floor of a top freezer. Sign up to receive our free Maintenance Reminder Newsletter. If you can find the schematic, you may be able to determine the proper resistance rating. Freezing food? If so, you will need to test the defrost heater and the defrost thermostat. Please note that a continuity test will not work on defrost heater because the ohm value is too high to register on a continuity test.
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