Payne Furnace Code 34.4
Safety faultShown as: Major code 34 on the LED (3 short, 4 long); 34.4 on the display
Flame lost while the furnace was operating at reduced inducer pressure following a previous 34.3 fault.
Manual wording: “34.4 FLAME LOST - While operating at reduced inducer pressure from previous 34.3 fault condition.”
Documented for: PG80MSU
Likely causes, most common first
- Same causes as 34.3 - flame sensor, gas pressure, control ground, flame carryover
What you can safely check yourself
- Check that the air filter is clean and vents are open
When to call a technician
This code follows a chain of flame losses. Have a technician diagnose the combustion and flame sensing before running the furnace.
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