Adding to RobQ’s response…
It’s potentially important to remember/consider placement (location-wise) in the freezer.
It’s all too easy to forget that modern (frost-less) refrigerators/freezers have a defrost circuit built in. If you put the nic next to the area that heats up (where the defrost bar runs) then you could conceivably have ruined it that way too.
A shot in the dark, but bears reminding most folks, who don’t normally service/think of such things. I wouldn’t have thought about it (much) myself previously, but for having to replace the evaporator fan in my freezer recently (the fridge wasn’t getting cold, but the freezer worked perfectly!)