Bryant Furnace Code 33.2
WarningShown as: Major code 33 on the LED (3 short, 3 long); 33.2 on the display
Lockout to high heat only for the current cycle, following limit circuit trips.
Manual wording: “33.2 LOCKOUT - High Heat Only for current cycle.”
Documented for: 926TC
Likely causes, most common first
- Dirty filter or restricted duct system
- Loose blower wheel
- Defective switch or connections
- Defective blower motor
- Improper gas input adjustment
What you can safely check yourself
- Replace the air filter
- Open any closed supply registers and clear blocked return grilles
When to call a technician
Repeated limit trips need a technician to check airflow, blower performance, and gas input rate.
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