FieldBench
Goodman codes

Goodman

Rapid flash

Lockout

Polarity reversed

L1/N swapped. Not ‘code 10’ and not a high flash count.

Walk Rapid flash in Diagnose

Sign in for the next measurement

First check

1 Hot and neutral at the IFC, not the disconnect

On Goodman GMSS96 polarity/ground is measured at the board. A correctly landed disconnect with a swapped whip at the IFC still throws this. Hot and neutral at the IFC, not just the disconnect.

Expect: L1 hot, N neutral, ~120 VAC L1 to N, ~0 VAC N to ground.

The rest of the walkthrough is Diagnose.

On the plates

  • Hot and neutral at the IFC, not just the disconnect.
  • Burner-box ground. Rapid flash is EA-class, not a PS.

Plates that use Rapid flash