GOODMAN DIAGNOSTIC REFERENCE MODULATING FURNACE (GMVM97) — DUAL 7-SEGMENT DISPLAY DOC GOODMAN-GMVM97-B6

Goodman furnace: Blower Voltage or Temperature Trip (b6)

Q: What does b6 mean on a Goodman GMVM97 furnace?

Blower Voltage or Temperature Trip (b6). Over/under line voltage to the furnace, or the motor exceeded its temperature limit.

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.

See what causes this code ↓ Get repair quotes near you

Supply-voltage check first.

What causes it (in order of likelihood)

High/low AC line voltage; overheated motor 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

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 Goodman GMVM97 Service Manual, p.67/68

Last verified 2026-07-06 · how we verify

Related Goodman fault codes

These codes use the same modulating furnace (gmvm97) — dual 7-segment display system.

Pattern	Meaning
b5	Blower Locked Rotor (b5)
b7	Incomplete Parameters Sent to Motor (b7)
b4	Blower Current Trip or Lost Rotor (b4)
b9	Low Indoor Airflow (b9)

See all Goodman furnace fault codes →