GOODMAN DIAGNOSTIC REFERENCE MODULATING FURNACE (GMVM97) — DUAL 7-SEGMENT DISPLAY DOC GOODMAN-GMVM97-D4

Goodman furnace: Invalid Memory Card Data (d4)

Q: What does d4 mean on a Goodman GMVM97 furnace?

Invalid Memory Card Data (d4). The control rejected the memory card — cards are model-specific and a mismatched card will be refused.

d4 YOUR LIGHT: DISPLAY CODE D4 — MATCH IT ABOVE

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What does d4 mean on a Goodman GMVM97 furnace? The control rejected the memory card — cards are model-specific and a mismatched card will be refused.

See what causes this code ↓ Get repair quotes near you

Correct card from the distributor.

What causes it (in order of likelihood)

Memory card doesn't match this model 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.66/68

Last verified 2026-07-06 · how we verify