Cleveland Controls DFS-221-153 Switch Always verify the model number

Always verify the model number on the unit nameplate to ensure this specific Lennox 1-stage LP kit or 2-stage compatible spring is the correct match for your burner manifold configuration

Can I bypass this switch for testing

the gas orifice must be sized correctly for the specific BTU requirements of your furnace's fuel source

This SPST temp control (Single Pole Single Throw) is engineered with a specific 65 degree open and 75 degree close logic

Cleveland Controls DFS-221-153 Switch Always verify the model numberThe Cleveland Controls DFS 221 153 is a precision engineered airflow proving switch designed for critical monitoring in duct heaters, commercial ovens, and high demand HVAC systems. This differential air pressure sensing switch features a factory fixed setpoint of 0. 05" W. C., making it an ideal choice for applications requiring a non adjustable, tamper proof safety control. Built with a robust zinc plated housing and a high performance silicone