Description
York S1-025-27747-003 Rollout Switch Overview
The York S1-025-27747-003 is a 160°F manual reset, single-pole single-throw (SPST) rollout switch engineered to protect furnaces and heating systems from the hazards of flame rollout. When burner flames escape the combustion chamber and roll out beyond their intended path, this safety switch detects the elevated temperature and immediately interrupts the circuit — shutting down the burner before damage or injury can occur.
Key Features
- Trip temperature: 160°F — activates at the precise threshold to stop flame rollout events
- Manual reset design — requires intentional technician reset after trip, preventing automatic restart until the root cause is identified and corrected
- SPST (Single-Pole Single-Throw) switching configuration for straightforward wiring integration
- Direct OEM replacement for compatible York furnace models
- Durable construction built to withstand the high-heat environment of a furnace burner compartment
- Reliable thermal sensing element for consistent, repeatable protection
How It Works
The rollout switch is mounted near the furnace burner assembly. Under normal operation, the switch remains closed, allowing the control circuit to function. If flame rollout occurs — caused by a blocked heat exchanger, restricted flue, or other combustion fault — the ambient temperature at the switch location rises to 160°F, tripping the switch open and cutting power to the burner. Because this is a manual reset device, a qualified technician must diagnose and resolve the underlying issue before pressing the reset button to restore operation.
Application
- Replacement rollout safety switch for York furnaces and compatible heating equipment
- Ideal for residential and light commercial forced-air furnace applications
- Recommended for use by licensed HVAC technicians during routine maintenance or system troubleshooting
Why Choose the York S1-025-27747-003
Using the correct OEM-specified rollout switch ensures proper trip temperature calibration and reliable circuit protection. Substituting an incorrect switch can result in nuisance trips or, worse, failure to protect the system during a genuine rollout event. The York S1-025-27747-003 delivers the exact specifications your equipment requires for safe, code-compliant operation.
