Heater diagram
Part #LH33ZS004
Heater diagram
Part #LH680013
Replaced by #LH680-014
Heater exchanger diagram
Part #320720-760
Heater exchanger diagram
Part #HH12ZB250
Casing assy diagram
Part #319840-303
Heater exchanger diagram
Part #320722-752
Replaced by #334357-755
Heater exchanger diagram
Part #320726-753
Replaced by #330541-753
Casing assy 2 diagram
Part #319893-401
The manufacturer no longer makes this part, and there's no substitute part
Induced draft diagram
Part #HC23CE116
Replaced by #340793-762
Heater exchanger diagram
Part #319873-314
Replaced by #319873-714