the L270F limit switch has likely tripped due to excessive internal temperatures

Ensure the 1/4" threads are clean and fully seated into the female receptacle of the Warrick probe fitting

This specific model features 1/4" ODS (Solder) extended pipe ends for permanent

While it features a corrosion-resistant shaft

this is a model-specific Weil McLain 383-500-619 assembly

KMC Controls MCP-8031-8101 Actuator Els PW 17895 the L270F limit switch hasThe KMC Controls MCP 8031 8101 is a heavy duty pneumatic damper actuator designed for reliable modulation of VAV terminals, ductwork, and small dampers in commercial HVAC systems. This model is a direct replacement for M693 8095 and M693 8095 1, offering a 1 11 16 inch stroke and a 4 to 8 PSI spring range. Engineered with a rugged metal body, it is fully compliant for installation in ceiling plenum environments where nonmetallic components are