Bryant Furnace Code 14.3
Safety faultShown as: Major code 14 flashed on the LED (1 short, 4 long); 14.3 on the display
Lockout after seven loss-of-flame events during a single heat request.
Manual wording: “14.3 LOCKOUT - 7 loss of flame events during a heat request”
Documented for: 926TC, 912SE
Likely causes, most common first
- Incorrect manifold pressure and gas firing rate
- Gas inlet pressure fluctuations
- Flame sensing problem - see code 34
What you can safely check yourself
- Check that the air filter is clean and supply and return vents are open
When to call a technician
Do not keep resetting the furnace to force it to run. Seven flame losses in one call needs a technician to check gas supply and combustion setup.
A Bryant furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Sources
- 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
- Installation, Start-up, Operating and Service and Maintenance Instructions - 912SE (Bryant Heating & Cooling Systems, 912SE Legacy Line 92% single-stage condensing gas furnace) · checked 2026-08-25