Mn Mike for Model Number et1chmxkb03 opened back of freezer unit completely covered in frost melted all now installing new defrost timer what number does black wire go on for model et1chmxkb03 tested and when manually on the heater came on now defrost cycle done but timer not advancing if not the timer what else could cause this buildup?
Answer Mike, In your case, the loose, black, timer motor wire should be attached to the #1 Terminal of the replacement timer. Then, the Orange wire attaches to terminal #1, Pink wire to terminal #2, White wire to terminal #3, And Red wire to terminal #4. When wired in this configuration, the timer will produce a defrost cycle every eight(8) hours of compressor run time and after the defrost bi metal thermostat closes. The other components of the defrost system is the heater WP2315530, which should have a resistance of 30 to 40 ohms, when tested with a multi meter, and the defrost thermostat WP4387503 which will have a "closed" circuit when cold or packed in ice, and an "open" circuit at room temperature. Read More... Answered by AppliancePartsPros.com | Tuesday, June 18, 2013