Payne Furnace Code 14.3
Safety faultShown as: Major code 14 flashed on the LED (1 short, 4 long); 14.3 on the display
Flame lost lockout - the flame signal was lost seven times during a single heat request.
Manual wording: “14.3 FLAME LOST LOCKOUT - Flame signal was lost 7 times during a single heat request. See status code 34.2 to 34.4.”
Documented for: PG80MSU
Likely causes, most common first
- Incorrect manifold pressure and gas firing rate
- Gas inlet pressure fluctuations
- Improper pressure transducer operation
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. Seven flame losses in one heat call needs a technician to check gas supply and the combustion setup.
A Payne furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Source
- PG80MSU: Installation, Start-up, Operating and Service and Maintenance Instructions (Payne, PG80MSU 80% multipoise gas furnace with 3-digit display and pressure transducer) · checked 2026-08-25