Goodman furnace: Reversed 115VAC Polarity (EA)
Professional repair
What does EA mean on a Goodman GMVM97 furnace? Line-voltage hot/neutral is reversed (or ground is poor) — the furnace refuses to run until corrected.
Line-voltage correction.
What causes it (in order of likelihood)
- Reversed line wiring / poor ground TECH
Parts for this code
No specific part number is verified for this code — it typically points at wiring, power, a blown fuse, or communication between components rather than one standard replacement part. If your diagnosis does land on a replaceable component, match its part number against your model's parts list before ordering.
Applies to
GMVM97
Different Goodman generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Verified against Goodman GMVM97 Service Manual, p.65/68
Last verified 2026-07-06 · how we verify
Related Goodman fault codes
These codes use the same modulating furnace (gmvm97) — dual 7-segment display system.
| Pattern | Meaning |
|---|---|
| E9 | High-Stage Pressure Switch Stuck Open (E9) |
| EC | Inducer Motor Overcurrent (EC) |
| E8 | High-Stage Pressure Switch Stuck Closed (E8) |
| EE | Improper Wiring to the Furnace (EE) |