Resideo L4008A1015/B Aquastat Controller with 5' Capillary

The Resideo L4008A1015/B is a high-limit aquastat controller designed for hydronic heating systems and boiler applications. This immersion-style temperature control features a 5-foot capillary tube for remote sensing and provides reliable temperature monitoring to prevent overheating conditions.

Key Features:

• Adjustable temperature range: 100°F to 240°F
• 5-foot capillary tube for flexible installation and remote sensing
• Manual reset design provides safety lockout on high-limit conditions
• Immersion well compatible for direct water temperature sensing
• Durable construction for long-term reliability in demanding applications
• SPST switching for simple circuit control

This aquastat controller is ideal for preventing boiler overheating by breaking the circuit when water temperature exceeds the set point. The manual reset feature ensures the system must be physically reset after a high-limit trip, providing an important safety function for hydronic heating systems.