Part #521769
Replaced by #EM3465F
Functional replacement parts diagram
Part #521768
Replaced by #EM3465F
Part #520939
Replaced by #45461
Blower assembly diagram
Part #520938
Replaced by #45461
Control box diagram
Part #705329
Replaced by #WR90-370
Heat exchanger diagram
Part #522559
Heat exchanger diagram
Part #1050144
Heat exchanger diagram
Part #521425
Blower assembly diagram
Part #522376
Heat exchanger diagram
Part #522531
The manufacturer no longer makes this part, and there's no substitute part