Goodman

E0

Lockout

Retry / recycle lockout

Too many failed ignition attempts or flame losses on this call.

9 plates — walk the one on the cabinet

First check

1 Measure µA while it is running

Do not clean first and guess. Series-µA the rod on Goodman GMEC96 during a call. Falling µA is oxide, ground, or a dying flame. A hard drop is often the pressure switch or limit opening, not the rod. Watch one full try: inducer, HSI, valve, flame, µA.

Expect: Typically ≥ 1.0 µA DC on this family — confirm the door card. Rising while running.

The rest of the walkthrough is Diagnose.

On the plates

Watch one full try: inducer, HSI glow, valve click, flame, µA.
Gas supply and manifold (low then high).
Ground and flame-rod cleanliness.
Do not keep resetting — find which step dies.
Watch one full try: inducer, HSI, valve, flame, µA. Which step dies?
Gas supply and manifold low then high.
Do not keep resetting the hour — find the failed step.
Watch one full try: inducer, HSI, valve, flame, µA.

Plates that use E0

Same number, other makers

E0 on Goodman is not the same code on these plates.