Heat exchanger diagram
Part #612919
The manufacturer no longer makes this part, and there's no substitute part
Part #600587
Part #613209
Part #613531
Replaced by #12910
Damper assembly diagram
Part #604636
Replaced by #604967
Furnace body diagram
Part #613839
Replaced by #3L05-1
Part #89726
Part #96839
Part #600586
Functional replacement parts diagram
Part #612254