HONEYWELL ST9120A 2004 Furnace Control Board OEM ARMSTRONG 40403-001 🔥Checked
Honeywell ST9120A 2004. Honeywell p/n ST9120A 2004, ST9120A2004. Checked in and removed from a working furnace by 2 HVAC professionals. Armstrong p/n 40403-001. OEM in certain models of Armstrong Furnaces.