Use with furnace models DGAA, DGAH, An others
Sometimes referred to as a circuit board or ignition control. For a spare or replacement fuse, order a 3A fuse G32-189 found below.
Replaces 7990-320, 7990-320P, 031-01910-000, 031-01932-000, 031-01932-001, 03101932002 & 031-01932-002
Diagnostic Flash Codes
Steady light on - normal operation.
One flash - ignition failure.
Two flashes - combustion air switch stuck closed.
Three flashes - combustion air switch failed to close.
Four flashes - limit switch open.
Five flashes - gas valve energized with no call for heat.
Rapid flashing - reversed polarity.
Note: Color of light is green.
The 2-minute video below illustrates how this board controls the operation of your furnace: