Masters john63 and Reg reveal a stealth recall campaign for this problem:
---an undocumented Service Campaign.
Some LG servicers are not aware of this as well.
some info for some models
(at least in) Canada: (maybe also USA)
"LG has committed to giving a lifetime warranty with regard to the light bulb defect
to the owners of affected LG and Kenmore refrigerators at no charge to the customer.
The warranty includes performing the necessary in-house repairs and possibly replacing the refrigerator in cases where
the plastic liner has warped to the point of being irreparable due to the increased heat generated by the light bulb."