GOODMAN DIAGNOSTIC REFERENCE MODULATING FURNACE (GMVM97) — DUAL 7-SEGMENT DISPLAY DOC GOODMAN-GMVM97-B2

Goodman furnace: Blower Horsepower Mismatch (b2)

Q: What does b2 mean on a Goodman GMVM97 furnace?

Blower Horsepower Mismatch (b2). The installed motor's horsepower doesn't match the shared data set — usually after a wrong replacement motor or wrong memory card.

b2 YOUR LIGHT: DISPLAY CODE B2 — MATCH IT ABOVE

Professional repair

What does b2 mean on a Goodman GMVM97 furnace? The installed motor's horsepower doesn't match the shared data set — usually after a wrong replacement motor or wrong memory card.

See what causes this code ↓ Get repair quotes near you

Verify motor PN for the model; reload correct data.

What causes it (in order of likelihood)

Wrong motor or wrong shared data 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.66/68

Last verified 2026-07-06 · how we verify