Goodman
EEA
LockoutReversed polarity / ground
L1/N reversed or chassis ground missing.
Walk EEA in Diagnose
Sign in for the next measurement
First check
1 Hot and neutral at the IFC, not the disconnect
On Goodman GR9S96 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. Burner-box ground screw.
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. Burner-box ground screw.