Description
Ensure safe, reliable temperature regulation in hydronic heating systems with the Honeywell/Resideo L4080B1352/B. This immersion‑type High‑Limit Aquastat controller automatically shuts off the burner when water temperature exceeds the adjustable set point, preventing overheating and protecting system integrity
Features
- High Limit Aquastat Controller has adjustable set point.
- Models available for use with immersion wells or for direct immersion if faster response is needed.
- A factory-set stop is available on L4080 to prevent setting the control at too high a temperature.
- Models available with second limit switch to shut off all gas to the burner.
- Liquid fill in sensing element expands as the boiler temperature rises.
- At the set point temperature, a diaphragm-actuated snap switch breaks the power supply to the burner primary control.











