York S1-025-22273-003 Limit Switch this rod utilizes a microamp

this rod utilizes a microamp signal to confirm the presence of a pilot or burner flame

the physical fit between the bulb and the well is critical

This often stems from a dirty furnace air filter

the York S1-025-29041-006 may be stuck open or out of calibration

York S1-025-22273-003 Limit Switch this rod utilizes a microampThe York S1 025 22273 003 Limit Switch is a critical OEM safety component engineered for precise thermal monitoring in high performance HVAC systems. This SPST automatic reset limit switch is calibrated to open the electrical circuit at 160F, effectively halting operation to prevent heat exchanger damage or unsafe conditions. Once the induction or blower housing temperature stabilizes and drops to the 120F close setpoint, the switch automatically