Lennox 75W15 Limit Switch 323613-751 this replacement air filter prevents

this replacement air filter prevents premature wear on internal valves and cylinders

The design includes a slip-on removable cover secured by steel screws and a provision for a padlock to prevent unauthorized tampering with smoke detection systems

When you're dealing with fan coil units or terminal systems

If your blower wheel or housing is damaged

Lennox 75W15 Limit Switch 323613-751 this replacement air filter preventsThe Lennox 75W15 Limit Switch is a high performance L165 30F limit switch designed as a genuine OEM replacement for residential and commercial heating equipment. Engineered to function as a critical safety control, this Lennox furnace limit switch operates as a normally closed (NC) snap disc limit control that opens at 165F and resets at 135F. This automatic reset component is essential for preventing heat exchanger damage by interrupting the gas