Resideo by Honeywell L4008B1013 Remote Bulb Aquastat Temperature Control

The Resideo by Honeywell L4008B1013 is a remote bulb aquastat temperature control designed for reliable monitoring and control of water temperature in hydronic heating systems, boilers, and hot water storage tanks. This controller features a remote sensing bulb with a 5-1/2 foot capillary tube, allowing flexible placement for accurate temperature measurement away from the control unit.

Key Features:

• Adjustable temperature range: 100°F to 240°F for precise control of heating applications
• Adjustable differential: 5°F to 30°F allows customization of temperature swing between on/off cycles
• Remote bulb design with 5-1/2 foot capillary tube for flexible installation and accurate sensing
• Single pole, single throw (SPST) switching mechanism
• Reliable liquid-filled sensing bulb provides accurate temperature measurement
• Durable construction suitable for commercial and residential HVAC applications
• Simple installation with universal mounting options

This aquastat is ideal for applications requiring precise water temperature control, including boiler systems, radiant heating systems, and domestic hot water tanks. The adjustable differential setting helps prevent short cycling and extends equipment life while maintaining consistent temperature control.