Payne Furnace Code 26.1
WarningShown as: 2 short flashes, 6 long flashes; 26.1 on the display
Loose factory wiring - a jumper in the factory wiring harness is loose or disconnected.
Manual wording: “26.1 LOOSE FACTORY WIRING - Jumper in factory wiring harness is loose or disconnected (pins reserved for future use).”
Documented for: PG80MSU
Likely causes, most common first
- Jumper connection between PL1-2 and PL1-4 loose or disconnected
When to call a technician
The jumper is on the control board's low-voltage harness inside the furnace cabinet - have a technician reseat it.
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