Which condition is likely to indicate a malfunctioning metering device?

A malfunctioning metering device in an HVAC system can lead to several symptoms that indicate inefficiencies or improper function.

When considering consistent room temperature, a metering device is designed to control the flow of refrigerant accurately based on the thermal loads in the space it serves. If the temperature remains constant despite changes in thermal loads, it may suggest that the device is not allowing sufficient refrigerant flow or is stuck in a position that does not respond to load requirements correctly.

Intermittent cooling can also signal issues with the metering device. If the cooling cycle is kicking in and out unpredictably, the metering device may not be regulating the refrigerant properly, causing fluctuations in system performance. This erratic behavior could indicate blockage or mechanical failure within the device.

High humidity levels can further confirm a malfunction as well. A metering device that is not functioning correctly might fail to deliver proper cooling or dehumidification because it can either overfeed or underfeed refrigerant to the evaporator coil. This improper refrigerant management can lead to elevated humidity because the air is not being effectively dehumidified, which should occur during cooling.

Each of these conditions—consistent room temperature, intermittent cooling, and high humidity levels—can indicate a problem with the