Part #521769
Replaced by #WG840465
Functional replacement parts diagram
Part #521768
Replaced by #WG840465
Blower assembly diagram
Part #520938
Replaced by #45461
Part #520939
Replaced by #45461
Heat exchanger diagram
Part #522531
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger diagram
Part #613709
Heat exchanger diagram
Part #605088
Heat exchanger diagram
Part #522559
Control box diagram
Part #504096
Blower assembly diagram
Part #522376