Constructed with durable materials to resist scale buildup

providing improved durability and standard 14-inch lead length

Enhanced Durability: Silicon nitride construction provides superior resistance to oxidation and physical damage compared to standard carbide ignitors

The silicone diaphragm is designed to handle air and inert combustion by-products that do not degrade silicone materials

York S1-025-27747-012 Rollout Switch Constructed with durable materials toThe York S1 025 27747 012 Rollout Switch is a critical safety component designed for York gas furnaces and Johnson Controls HVAC systems. Engineered to respond to flame rollout or unsafe combustion conditions, this manual reset limit switch triggers at a fixed thermal threshold of 260 degrees Fahrenheit. As a Single Pole Single Throw (SPST) control, it serves as the primary circuit interrupt for the gas valve when it detects temperatures exceeding