Resideo L4006A1678 High/Low Limit Aquastat Controller 100°F-240°F/5°F-30°F Differential

The Resideo L4006A1678 High/Low Limit Aquastat Controller serves as a temperature regulator for HVAC systems that operate in hydronic heating systems and boilers. The controller operates between 100°F and 240°F temperature ranges with adjustable limits that can vary from 5°F to 30°F. This product protects heating systems by monitoring temperature ranges to prevent both overheating and low-temperature conditions which results in safe operation, longer equipment lifespan and reduced energy usage and improved comfort and safety.