AMANA DIAGNOSTIC REFERENCE DUAL 7-SEGMENT DISPLAY (TWO-STAGE VARIABLE-SPEED) DOC AMANA-D4

Amana furnace: Invalid Memory Card Data (d4)

Q: What does d4 mean on a Goodman furnace?

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

d4 YOUR LIGHT: DISPLAY CODE D4 — MATCH IT ABOVE

Professional repair

What does d4 mean on a Goodman furnace? The control rejected the shared data set — memory cards are model-specific and a card for a different model will be refused.

See what causes this code ↓ Get repair quotes near you

Obtain the card matching your model number from the distributor.

What causes it (in order of likelihood)

Wrong memory card for this furnace model TECH

Applies to

GMVC96 · GCVC96 · AMVC96 · ACVC96

Different Amana 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