What is the purpose of a low water cut out on a boiler?

The low water cut out is a critical safety feature in boiler operation. Its primary purpose is to shut off the burner when a low water condition exists. This is essential because if the water level drops too low, the boiler can overheat, leading to serious damage or even catastrophic failure. By interrupting the fuel supply to the burner during low water scenarios, the low water cut out helps prevent overheating and ensures that the boiler operates safely and efficiently.

Maintaining an adequate water level in the boiler is vital for proper function, as water acts as a coolant and a medium for heat transfer. If the water level falls below a certain point, the cut out activates, thereby protecting the boiler and its associated systems from the risks posed by improper water levels.