FieldBench
Goodman codes

Goodman

d0

Lockout

No shared data / missing memory card

IFC cannot read the furnace identity card. Classic after an IFC swap when the card stayed on the old board or in the box.

Walk d0 in Diagnose

2 plates — walk the one on the cabinet

First check

1 Read the plug / card on THIS cabinet

On Goodman GMVC96 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. Look at the small memory / shared-data card on the IFC. It must be present 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

  • Look at the small memory / shared-data card on the IFC. It must be present and seated.
  • Move the card from the failed IFC onto the replacement — that card is the cabinet.
  • A blank replacement board with no card will not run this furnace. Do not ‘program around it’ with GR9T96 taps.
  • Move the card from the failed IFC onto the replacement. That card is the modulating cabinet.
  • A blank board with no card will not run. Do not borrow a GMVC96 two-stage card to ‘get heat.’

Plates that use d0

Same number, other makers

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