Control box diagram
Part #521516
Replaced by #90-244
Control box diagram
Part #521515
Replaced by #90-244
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
#NI
All parts diagram
Part #C-163-S
Replaced by #450288-001
Control box diagram
Part #705329
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger diagram
Part #521425
Control box diagram
Part #504096