Heat exchange & panel diagram
Part #HH18HA502
Main assy diagram
Part #AS88PD005
Inducer & gas ctrl diagram
Part #HC21ZE126
Inducer & gas ctrl diagram
Part #326634-401
Main assy diagram
Part #326614-701
Main assy diagram
Part #313974-751
Control box diagram
Part #HY60CM500
Inducer & gas ctrl diagram
Part #326627-752
Casing diagram
Part #327260-401
Part #HT01BC116
The manufacturer no longer makes this part, and there's no substitute part