GOODMAN DIAGNOSTIC REFERENCE DUAL 7-SEGMENT DISPLAY (TWO-STAGE VARIABLE-SPEED) DOC GOODMAN-B2

Goodman furnace: Motor Horsepower Mismatch (b2)

Q: What does b2 mean on a Goodman furnace?

Motor Horsepower Mismatch (b2). The connected motor's horsepower doesn't match the shared data set — the furnace refuses to run. Fix: correct motor, or correct data via the proper memory card.

b2 YOUR LIGHT: DISPLAY CODE B2 — MATCH IT ABOVE

Professional repair

What does b2 mean on a Goodman furnace? The connected motor's horsepower doesn't match the shared data set — the furnace refuses to run. Fix: correct motor, or correct data via the proper memory card.

See what causes this code ↓ Get repair quotes near you

Verify motor part number vs. model; reload correct shared data.

What causes it (in order of likelihood)

Wrong replacement motor or wrong data set TECH

Applies to

GMVC96 · GCVC96 · AMVC96 · ACVC96

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 Goodman GMVC96/GCVC96 Service Manual, p.45

Last verified 2026-07-06 · how we verify