Resideo L7248L1105/B Aquastat L99H008 A red flashing light typically

A red flashing light typically indicates a mechanical jam or that the stroke was not detected during calibration

optimizing the performance of chilled water systems

017 orifice

Standard Altitude Optimized: Specifically engineered for peak performance in installations from sea level up to 2

meaning it provides a constant drive ratio

Resideo L7248L1105/B Aquastat L99H008 A red flashing light typicallyThe Resideo L7248L1105 B Aquastat is an immersion style high limit controller designed for precise hydronic heating system management. This electronic oil boiler control monitors water temperature directly via a boiler well, serving as a critical safety and operational interface for oil or gas fired units. It functions by cycling the burner to maintain the high limit setpoint while offering an adjustable differential to optimize burner run times and