How does a float switch function in a condensate pan?

A float switch in a condensate pan plays a critical role in managing the water accumulation from the air conditioning system. When the condensate pan fills with water due to condensation, the float switch rises with the water level. Once the float reaches a certain height, it activates a switch that prompts the system to turn off. This action is essential to prevent overflow, which can lead to water damage or a disruption in operation.

The float switch acts as a safety device, ensuring that the condensate does not exceed a certain level, thereby protecting both the equipment and the surrounding environment. This functionality is particularly important in residential and light commercial HVAC applications, where managing moisture is vital for maintaining system efficiency and preventing issues associated with water damage.

In contrast, the other options do not accurately describe the role of a float switch in a condensate pan. The float switch does not measure temperature, balance pressure, or regulate the flow of refrigerant, thereby confirming that its primary function is indeed to shut off the system to prevent overflow.