Goodman furnace: Reversed Line Polarity (EA)
Professional repair
What does EA mean on a Goodman furnace? 115V or 24V power leads are reversed — the furnace refuses to run. Same fix family as the continuous-flash code on flash models.
Line-voltage wiring correction.
What causes it (in order of likelihood)
- Reversed hot/neutral or transformer leads, 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
GMVC96 · GCVC96
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 GMVC96/GCVC96 Service Manual, p.44
Last verified 2026-07-06 · how we verify
Related Goodman fault codes
These codes use the same dual 7-segment display (two-stage variable-speed) system.
| Pattern | Meaning |
|---|---|
| d0 | No Shared Data (d0) |
| E9 | High-Stage Pressure Switch Stuck Open (E9) |
| d4 | Invalid Memory Card Data (d4) |
| E8 | High-Stage Pressure Switch Stuck Closed (E8) |