Goodman GMVM97 furnace code b2: Blower Horsepower Mismatch
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.
Before you touch anything: the six signs that mean stop troubleshooting and call a pro →
Verify motor PN for the model; reload correct data.
What causes it (in order of likelihood)
- Wrong motor or wrong shared data 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.
Questions about this code
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.
How do I fix Goodman GMVM97 furnace code b2?
A technician should verify the motor part number for the model and load the correct data.
How much does it cost to fix Goodman GMVM97 furnace code b2?
Cost depends on whether the motor or the data needs correcting. If this followed a recent repair, ask whoever did the work to review it.
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.66/68
Last verified 2026-07-06 · page updated 2026-10-03 · how we verify
Related Goodman furnace codes
These codes use the same modulating furnace (gmvm97) — dual 7-segment display system.