Payne Furnace Code 45
Soft lockoutShown as: 4 short flashes, 5 long flashes
Control circuitry lockout. The board detected an internal failure and locks out, auto-resetting after 1 hour.
Manual wording: “45 CONTROL CIRCUITRY LOCKOUT Auto-reset after 1 hour lockout due to: - Flame circuit failure. - Gas valve relay stuck open. - Software check error.”
Documented for: PG92ESA, PG95ESA, PG96VTA
Likely causes, most common first
- Flame circuit failure
- Gas valve relay stuck open
- Software check error
What you can safely check yourself
- Turn the furnace off at the service switch for a minute and back on once - the manual says resetting power clears the lockout
When to call a technician
Payne's own instruction is to replace the control if the code repeats after a power reset. That is a technician job.
A Payne furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Sources
- PG92ESA: Installation, Start-up, Operating and Service and Maintenance Instructions (Payne, PG92ESA multipoise 92% single-stage condensing gas furnace) · checked 2026-08-25
- PG95ESA: Installation, Start-up, Operating and Service and Maintenance Instructions (Payne, PG95ESA multipoise 95% single-stage condensing gas furnace) · checked 2026-08-25
- PG96VTA: Installation, Start-up, Operating and Service and Maintenance Instructions (Payne, PG96VTA two-stage, variable-speed ECM 4-way multipoise condensing gas furnace) · checked 2026-08-25