GOODMAN DIAGNOSTIC REFERENCE MODULATING FURNACE (GMVM97) — DUAL 7-SEGMENT DISPLAY DOC GOODMAN-GMVM97-B6
Goodman furnace: Blower Voltage or Temperature Trip (b6)
b6 YOUR LIGHT: DISPLAY CODE B6 — MATCH IT ABOVE
Professional repair
What does b6 mean on a Goodman GMVM97 furnace? Over/under line voltage to the furnace, or the motor exceeded its temperature limit.
Supply-voltage check first.
What causes it (in order of likelihood)
- High/low AC line voltage; overheated motor TECH
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