Customer Questions and Answers for Defrost Heater by Whirlpool

Hello Chad, The procedure is as follows: DEFROST HEATER CHECKING PROCEDURE Obtain an ohmmeter from your local store. We will be doing RESISTANCE checks. This is the safest way because the refrigerator is unplugged from the power source and avoids the possibility of receiving an electrical shock. Step 1 Set the ohmmeter scale to the lowest ohms setting and ZERO the meter. Step 2 Remove one wire at a time, carefully labeling each wire according to the location or terminal marking on the defrost heater. This procedure should assure that the right wire is reconnected to the right terminal after checking or replacing. Step 3 Touch and hold one ohmmeter probe to one of the terminals. Step 4 Touch the other ohmmeter probe to the other terminal. Step 5 The ohmmeter should show a reading between 10-1,000 ohms on the ohms scale. If not, the defrost heater is bad and needs replacing. Step 6 Reconnect the wires to the proper terminals as previously marked.

Hello Chad. The heater is in the freezer. You unplug it and insert the leads of the meter into the heater wires to test it. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html