Bryant Furnace Code 15.1
Soft lockoutShown as: 1 short flash, 5 long flashes
Blower RPM lockout. The control locked out because no blower RPM was detected.
Manual wording: “15.1 BLOWER RPM LOCKOUT - Lockout occurs when no blower rpm is detected.”
Documented for: 926TC
Likely causes, most common first
- Loose blower wire connections
- Failed blower motor
What you can safely check yourself
- Make sure the blower access door is fully closed and latched - the door switch cuts power to the blower
When to call a technician
Testing an ECM blower motor and its harness requires a technician with the right meter and the motor's specifications.
A Bryant furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Source
- Installation, Start-up, Operating and Service and Maintenance Instructions - 926TC (Bryant Heating & Cooling Systems, 926TC Preferred Series two-stage, variable-speed ECM multipoise condensing gas furnace) · checked 2026-08-25