Jenn-Air fridge not cooling

Yes, the problem is most likely with the
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61005988.
I just watched my repair guy fix our fridge with this same problem ($232.75 later). What is happening, is that the freezer coil no longer defrost itself. Cold air cannot then blow into the refrigerator side anymore. To fix, remove cover at the bottom of the freezer and manually defrost the coils with warm water ... use bath towels at bottom of freezer to soak up the water. Replace the cover and then go to the refrigerator side. Remove the plastic cover at the top of the compartment to access ("ADAPTIVE DEFROST ENCL. 61005988).. This is a small plastic box measuring 3 1/8" x 3 3/4".
Simply un-plug the wires, and plug- in the new unit, then re-assemble with just a few screws. The retail cost of the part is $92 from the appliance guy, but you can probably find it on the net far cheaper.It's a really easy job that can be done by anyone slightly handy ...and you will probably save yourself at least $100 in the process. The next time this happens, I know what to do. It shouldn't take more than 1/2 hour for the whole process. If you mess up (which I'm pretty sure you won't) you should save some dis-assembly labor for your technician and some $ in the process. It's really easy to fix!

We had same problem with brand new refrig.

Serviceman just left - he replaced part  with label

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61005988. I hope this works.