79575313900 Kenmore Freezer - Overview

This refrigerator/freezer problem had been escalating for almost a year, requiring me to frequently knock the ice buildup free with a rubber mallet. I finally decided to try to identify the problem by removing the freezer door and all of the shelves and shelf tracks (easily removed with only a phillips screwdriver). Then I removed the back plastic panel to expose the cooling coils, which were partially encased in ice. I deduced that the evaporator fan motor was failing, which blows air over the freezer cooling coils and forces the cool air up into the upper refrigerator section (which was not staying cold). I then found and ordered the fan motor from part select. Their search function and exploded drawing schematics made it easy to identify the part and part number. It seems the original part number had been superceded with a new number, which I ordered. Once it arrived after about a week, I transferred the fan blades from the old motor to the new fan motor, and after completely drying out the freezer compartment, I reinstalled all of the parts and plugged in the unit and waited. By the next day, the refrigerator was operating at peak efficiency, and the ice buildup in the freezer has not returned. I was very close to scrapping the entire refrigerator as junk, but with a little diagnostic effort and about $110 for the new motor, I have a fully functioning refrigerator again. Thanks to Part Select for a great experience.

As per utube

This is bottom drawer type frige. Icemaker is inside (not in the door) and hard to reach. I first tested the solenoids by disconnecting them and using a test cord, energized them independent of the frige wiring. They worked ok. Note: this frige has (2) solenoids going to the icemaker. And it has (3) solenoids serving the water dispenser. The icemaker solenoids are wired in parallel. I removed the icemaker by removing (1) screw from the bottom and loosening (2) on the top. Then removed icemaker as a complete unit disconnecting the wire connector at the same time. On the bench I tested the icemaker to verify it was defective. The wire harness has a 10 amp fuse in the black wire (hot wire). `The fuse was blown. This was sufficient to indicate the icemaker is shot. I did however, do some other tests. Cold resistance of the mold heater was 72 ohms. The timer motor was 4000 ohms. These measurements should be ok. I then activated the icemaker with a test cord, bypassing the blown fuse. The unit cycled one complete rotation then stopped. The mold heater worked. I tested the amp draw on the mold heater and it was only .1 amps. I should be a about .8 amps. I then cycled it again and then the timer motor began to sizzle and smell. Then it smoked and stopped mid-rotation. I then purchased a new icemaker. I believe the mold heater was going bad over time as this unit made ice but very slowly. This put extra strain on the motor as the mold was not releasing quickly. This damaged the motor causing it to fail.