WRF535SMBM00 Whirlpool Refrigerator

Having seen this problem before in other equipment so I had an idea where to look. Problem: the automatic defrost function was not operating. Looking through openings in the back panel of the freezer compartment, you could see the evaporator coils and fins were a solid chuck of ice. There are three logical components to check. Heater element, thermostat (located just above the evaporator) and a relay on the control board (located in the fridge control panel). Checked the heater with an ohm meter -- OK. The thermostat closes the circuit at around 20 degrees and opens at around 32 degrees. Pulled out the thermostat, wiring, fan unit. Everything unplugs, unscrews, and unclips, don't cut wires. Put the whole assembly in a friends freezer for an hour or so to see if the thermostat closes -- OK. Problem had to be with the control board. Replaced control board, reprogrammed it per included instruction. Everything is working again.

Removed the fruit & veggie drawers & the deli (pantry) drawer. Took out the 3 screws, removed the attached parts, put them on the replacement part, reattached it and put the drawers back in.

Here's the part I want to share: PartSelect had a expanded diagram showing the correct part and sufficiently detailed to figure out the repair before the part arrived. That's why I ordered from them. Secondly, I ordered the part Thursday morning--and the thing was sitting on my porch when I came back in from my evening out Saturday--2 days later!!!

Remove food off of lower shelf, remove the two produce drawers, remove large lower drawer, remove glass shelf, remove three screws holding end cap in place. Once end cap was removed the drawer track could be removed and placed on new end cap. Installation of new end cap took less than 5 minutes. Most of the time spent was removing/replacing food and cleaning the shelf/bins. PartSelect was awesome BTW!