Service Bulletin Description:
2 screws affixing the bearing retainer to the heater housing instead of 4
This Service Bulletin PDF download contains information for the following:
GCMX100EM, GCMX180ED, GFMN100EL, GFMN110EL, GMMN120EL, GMMP280ED, GMMP300EM, GMMP400EM, GMMP550ED, GMMX180ED, GTMN500EM, GTMN550ED, GTMP200EM, GTMP280ED, GTMP400EM, GTMP520ED, GTMS570ED, GTMX100EM, GTMX180ED, GUSR465EB, HTMX100ED, HTMX100EM, MTMX100ED, MTMX100EM, PCCB330EJ, PCVH640EJ, PCVH680EJ, PCVH680EJ, PCVH685EK
The PDF may also contain information that applies to additional models not listed.