FieldBench
Goodman codes

Goodman

d0 / d4

Lockout

Shared data / memory card

d0 = IFC has no shared-data set (replacement board, missing card) and cannot drive the serial ECM or calculate CFM. d4 = card rejected (wrong model card).

Walk d0 / d4 in Diagnose

3 plates — walk the one on the cabinet

First check

1 Read the plug / card on THIS cabinet

On Goodman GMVC80 the model plug or shared-data card must match this cabinet size. A 100 kBtu plug in an 80 cabinet overfires and limits. A leftover memory card after a control swap throws d0/d4-class codes. After an IFC swap the AMVC96 memory card must be installed and seated.

Expect: Plug / card part matches the rating plate and the replacement control bulletin.

The rest of the walkthrough is Diagnose.

On the plates

  • After an IFC swap the AMVC96 memory card must be installed and seated.
  • A GMVC96 card usually twins; an AMVM97, AVPTC, or AR9T96 card is d4.
  • Do not run the furnace on empty shared data and guess CFM.
  • Install the AMVM97 card, not an AMVC96 two-stage card.
  • GMVM97 twin card is the usual cross. AVPTC / AR9T96 cards are d4.
  • Empty tables will not drive the serial ECM or calculate CFM.

Plates that use d0 / d4

Same number, other makers

d0 / d4 on Goodman is not the same code on these plates.