Lennox 30M03 Limit Switch 321142-301 Standard Connectivity: Utilizes 1/2" NPT

Standard Connectivity: Utilizes 1/2" NPT connections and a universal 24-volt solenoid for streamlined integration into existing control circuits

ensuring reliable on/off control in zoned commercial or residential HVAC systems

always verify the 1/2 horsepower rating and 1 phase electrical specifications to ensure a drop-in match for existing equipment

This transformer is engineered with high-grade copper windings and a robust core to minimize thermal loss and prevent voltage drop under peak inductive loads

Lennox 30M03 Limit Switch 321142-301 Standard Connectivity: Utilizes 1/2" NPTThe Lennox 30M03 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial HVAC furnaces. This fixed temperature limit control is engineered with a specified range of 140 170F, ensuring the system shuts down if heat exchanger temperatures exceed safe operating parameters. As an OEM Lennox replacement part, this switch features an automatic reset mechanism, transitioning back to a closed state