What action should be taken if a unit is operating continuously?

When a refrigeration unit is operating continuously, it typically indicates that the system is struggling to maintain the desired temperature. One common reason for this persistent operation is low refrigerant levels. If the refrigerant level is inadequate, the system cannot efficiently absorb heat from the environment, which leads to it running longer than intended.

By checking for low refrigerant levels, you can determine if the refrigerant charge is insufficient, which could stem from leaks or improper initial charging. If low levels are confirmed, the appropriate action would be to repair any leaks and recharge the system to the correct levels, allowing for optimal operation. This helps restore efficiency and ensures the unit can cycle on and off as needed by effectively removing heat from the space being cooled.

The other options may relate to adjustments or modifications of the system operation but do not directly address the underlying issue indicated by continuous operation. For instance, increasing the refrigerant charge without checking for leaks could lead to overcharging, which can cause additional problems. Reducing airflow might worsen the cooling capacity, and adjusting thermostat settings could simply delay addressing the root cause of why the unit is running continuously.