Goodman
E7
LockoutIgniter open / no-ground
IFC did not see the igniter circuit behave as commanded.
Walk E7 in Diagnose
9 plates — walk the one on the cabinet
First check
1 Ohms at the igniter, then at the IFC
On Goodman GMEC96 measure cold ohms at the igniter plug, then at the IFC connector. An open at the plug is the element or local harness. Open only at the IFC is the harness rub-through on the collector. Igniter ohms cold, 120 VAC during warm-up, cracked nitride.
Expect: Nitride cold ohms per THIS door sticker — do not use an 80% Norton chart.
The rest of the walkthrough is Diagnose.
On the plates
- Igniter ohms cold (OEM — typically 30–115 Ω class, confirm sticker).
- 120 VAC to igniter during warm-up.
- Cracked nitride element.
- Igniter ohms cold and 120 VAC during warm-up.
- Cracked nitride. Burner-box ground screw (paint, missing star washer).
- Do not confuse with b0 — E7 is HSI/ground, b0 is the indoor blower.
- Igniter ohms cold, 120 VAC during warm-up, cracked nitride.
- Harness rub-through on the collector.
Plates that use E7
Same number, other makers
E7 on Goodman is not the same code on these plates.