Description
York S1-025-26392-003 SPST Rollout Switch Overview
The York S1-025-26392-003 is a Single-Pole Single-Throw (SPST) rollout switch engineered to protect your furnace from dangerous flame rollout conditions. By monitoring burner compartment temperatures and cutting power to the burner system when unsafe heat levels are detected, this switch is a critical safety component in York heating equipment and compatible systems.
Key Specifications
- Part Number: S1-025-26392-003
- Switch Type: SPST (Single-Pole Single-Throw)
- Open Temperature: 145°F
- Close Temperature: 105°F
- Function: Flame Rollout Protection
- OEM York Replacement Part
How It Works
The rollout switch continuously monitors the temperature near the burner assembly. If flame rollout occurs — caused by a blocked heat exchanger, restricted flue, or insufficient combustion air — the switch opens at 145°F, interrupting the circuit and shutting down the burner to prevent fire hazards or equipment damage. Once the burner area cools to 105°F, the switch closes and allows normal operation to resume.
Why Choose the York S1-025-26392-003
- Direct OEM replacement for York furnaces and heating systems
- Precise thermal trip points ensure reliable, consistent protection
- SPST design simplifies wiring and integration into existing control circuits
- Helps maintain system safety and code compliance
- Protects against heat exchanger damage and potential fire hazards
Application
This rollout switch is designed as a direct OEM replacement for York furnaces and compatible heating equipment. Always verify compatibility with your specific model before installation. Consult a qualified HVAC technician for proper diagnosis and replacement.









