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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
5 pole' vs '1 pole' mean for this part
it is critical to use the appropriate KH series crankarm for the specific shaft profile
Can I bypass this switch for testing
maintaining the sensitivity and modulation accuracy of the thermostat sensors
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