Optimized for R410A: Specifically calibrated for the pressure-temperature characteristics of high-efficiency R410A systems

including lead

commonly used in chilled water systems

OEM Reliability: Direct Daikin-McQuay replacement eliminates the mounting and calibration issues common with generic universal actuators

ensuring the venturi effect remains optimized for a consistent air-to-fuel ratio during high-demand operation

Laars Heating Systems R0023000 Limit Switch 321042-401 Optimized for R410A: Specifically calibratedThe Laars Heating Systems R0023000 Limit Switch is a critical safety component engineered to provide overheat protection for high performance hydronic and pool heating systems. This 150F high limit switch is calibrated to automatically interrupt the electrical circuit when internal water temperatures exceed the 150F threshold, effectively preventing thermal damage to the heat exchanger and downstream piping. As a veteran grade OEM replacement part,