but the unit must never be left in operation without a functional limit switch in the safety circuit

Can I use this switch in high-voltage line applications

While universal timers exist

Material: Metal Housing with Plastic Mounting Clip

identical replacement for the Lennox 15M4501 and is commonly found in G26 and G32 series furnaces

Lochinvar & A.O. Smith 100170461 Potentiometer Els PW 17895 but the unit must neverReplacing a worn out thermostat potentiometer is a standard procedure to restore precise temperature modulation in commercial and residential heating systems. The Lochinvar & A. O. Smith 100170461 Potentiometer is a critical HVAC replacement part designed for high duty cycles, ensuring that the control board receives accurate resistance feedback for burner sequencing. This specific component is a direct OEM match, confirming that the 100170461 is