Laars RE0015900 High Limit Aquastat with Manual Reset 100-225°F

The Laars RE0015900 is a high limit aquastat controller with manual reset designed for temperature safety control in residential and commercial boiler systems. This essential safety component monitors water temperature and provides overheat protection by shutting down the burner circuit when temperature exceeds safe operating limits.

Key Features:

• Temperature range: 100°F to 225°F (adjustable)
• Manual reset function requires operator intervention after lockout
• Remote bulb temperature sensing element with capillary tube for accurate, responsive temperature detection
• SPST (Single Pole Single Throw) snap-acting switch breaks circuit on temperature rise
• Visible control point scale with external adjustment screw for easy temperature setting
• Horizontal or vertical mounting capability
• Compatible with Laars boiler models including RHCH series

This aquastat utilizes Honeywell L4008E technology (cross-reference: L4008E1305) to provide reliable high-limit safety control. The manual reset feature ensures that the system cannot automatically restart after an overheat condition until the operator has investigated the cause and manually resets the control. Ideal for hydronic heating systems, water heaters, and boiler applications requiring UL-listed limit protection.