GOODMAN DIAGNOSTIC REFERENCE MODULATING FURNACE (GMVM97) — DUAL 7-SEGMENT DISPLAY DOC GOODMAN-GMVM97-EA

Goodman furnace: Reversed 115VAC Polarity (EA)

Q: What does EA mean on a Goodman GMVM97 furnace?

Reversed 115VAC Polarity (EA). Line-voltage hot/neutral is reversed (or ground is poor) — the furnace refuses to run until corrected.

EA YOUR LIGHT: DISPLAY CODE EA — MATCH IT ABOVE

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.

See what causes this code ↓ Get repair quotes near you

Line-voltage correction.

What causes it (in order of likelihood)

Reversed line wiring / poor ground TECH

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 GMVM97-Service, p.65/68

Last verified 2026-07-06 · how we verify