Goodman Furnace Photos

Closeup of the Goodman Label

Model HCA100ND4R

Serial 001222361

Image of the Wiring Schematic

The problem is that the furnace will not run when the fan is set to “Auto”

Turn the fan to “On”, allow the furnace to light, then back to “Auto”

And the furnace heats normally, then shuts off as it should.

Therefore, if I can find parts, I’m looking for the two limit switches

Highlighted by the purple arrows, below.

Image of the Overall Label