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

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.

Goodman furnace replacement parts

Search by your model number (on the blower-door label) for an exact match

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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.66/68

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
d2	Configuration: Two-Stage Cooling + Dehumidification (d2)
d1	Configuration: Single-Stage Cooling + Dehumidification (d1)
d0	Data Not Yet on Network (d0)
b9	Low Indoor Airflow (b9)

See all Goodman furnace fault codes →