Goodman

EEH

Lockout

Grounding error

IFC failed its ground check (sister to EA).

4 plates — walk the one on the cabinet

First check

1 Hot and neutral at the IFC, not the disconnect

On Goodman GR9S80 polarity/ground is measured at the board. A correctly landed disconnect with a swapped whip at the IFC still throws this. Green ground to cabinet and IFC. Painted screw, missing star washer.

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

Green ground to cabinet and IFC.
Painted screw, missing star washer.
If not twinned, nothing should be on the TWIN terminal.
Green ground to cabinet and IFC. Painted screw, missing star washer.

Plates that use EEH

GR9S80
Single-stage · 9-speed ECM · 80% Cat I
Diagnose GR9S80 — Sign in
GR9S96
Single-stage · 9-speed ECM · 96% AFUE · 7-seg EE-codes
Twin error
Twinning miswire or twin terminal active on a standalone unit.
Diagnose GR9S96 — Sign in
GR9T80
Two-stage · 9-speed ECM · 80% Cat I
Diagnose GR9T80 — Sign in
GR9T96
Two-stage · 9-speed ECM · 96% AFUE
Diagnose GR9T96 — Sign in

Same number, other makers

EEH on Goodman is not the same code on these plates.

Amana EEHGrounding error