ensuring consistent millivolt output within the standard 22-30mV range

This specific Lennox limit switch is often identified as 56M1301

Always verify the voltage output of your furnace control board before installation

the switch breaks the circuit to prevent equipment damage and ensure safe operation

It operates efficiently within an ambient temperature range of 32°F to 104°F

Fenwal 35-725903-997 Remote Sensor R-410A ensuring consistent millivolt output withinThe Fenwal 35 725903 997 Remote Sensor is a critical diagnostic and flame monitoring component designed for integration with Fenwal series ignition controls, specifically the Mark 10DX 117 and 35 72 series boards. Engineered for high temperature ionization sensing, this probe monitors flame conductivity to ensure safe and reliable furnace operation. Contractors typically deploy this surface mount flame sensor in commercial and residential HVACR