Service Bulletin Description:
Freezer compartment lighting may appear dim or the refrigerator compartment may have the upper light or a tower light not working. If the freezer lighting is dim, one of the tower LED boards may be found to be inoperable. Any inoperable LED board will have the correct operational voltage.
This Service Bulletin PDF download contains information for the following:
CSB42WP2NKS1 CSB48WP2NKS1 ZIS420NNKII ZIS480NNKII ZISB360DNKII ZISB420DNKII ZISB480DNKII ZISS360DNKSS ZISS420DNKSS ZISS420NNKSS ZISS480DNKSS ZISS480NNKSS
The PDF may also contain information that applies to additional models not listed.