Resideo L4008B1013 Control 318172 701 you must use it with you must use it with a high temperature rated actuator (typically the 'S' or 'AH' series) to ensure the internal components and motor are protected from heat transfer Common Questions Is the Johnson Controls P72LA 1 compatible with R 410A The Resideo L4008B1013 is a professional grade remote bulb immersion type temperature control designed primarily for circulator application in hydronic heating systems Key Benefits Enhanced Mounting Flexibility: Supports both horizontal and vertical mounting configurations for easier installation in tight boiler cabinets or storage tank panels