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

Parts for this code

No specific part number is verified for this code — it typically points at wiring, power, a blown fuse, or communication between components rather than one standard replacement part. If your diagnosis does land on a replaceable component, match its part number against your model's parts list before ordering.

Goodman furnace replacement parts

Search by your model number (on the blower-door label) for an exact match

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Applies to

GMVC96 · GCVC96

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

Related Goodman fault codes

These codes use the same dual 7-segment display (two-stage variable-speed) system.

Pattern	Meaning
b1	ECM Motor Communications Lost (b1)
b3	ECM Motor in a Limiting Condition (b3)
b0	ECM Blower Motor Not Running (b0)
b4	Motor Trips (b4)

See all Goodman furnace fault codes →