GOODMAN DIAGNOSTIC REFERENCE MODULATING FURNACE (GMVM97) — DUAL 7-SEGMENT DISPLAY DOC GOODMAN-GMVM97-B7
Goodman furnace: Incomplete Parameters Sent to Motor (b7)
b7 YOUR LIGHT: DISPLAY CODE B7 — MATCH IT ABOVE
Professional repair
What does b7 mean on a Goodman GMVM97 furnace? The control failed to deliver a complete parameter set to the ECM — a control-side error.
Control and shared-data reload. DIY part cost: $80–180 — a pro visit for this class of fault typically runs $150–350.
What causes it (in order of likelihood)
- Control/data fault TECH
Parts referenced by this code
PCBBF112S — Integrated Control Board
Always match parts against your model's parts list — part numbers vary within a series.
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.67/68
Last verified 2026-07-06 · how we verify