Goodman GMVM97 furnace code EA: Reversed 115VAC Polarity
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.
Before you touch anything: the six signs that mean stop troubleshooting and call a pro →
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.
Questions about this code
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.
How do I fix Goodman GMVM97 furnace code EA?
This is wiring work; don't open panels or test voltage. Call an electrician or HVAC technician.
How much does it cost to fix Goodman GMVM97 furnace code EA?
Cost depends on where the reversed wiring or poor ground is and how much correction is needed. Ask for a quote once the wiring fault has been located.
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 · page updated 2026-10-03 · how we verify
Related Goodman furnace codes
These codes use the same modulating furnace (gmvm97) — dual 7-segment display system.