What action should be taken when a unit shows low refrigerant pressure?

When a unit shows low refrigerant pressure, the appropriate action is to check for leaks and repair any identified issues before adding refrigerant. This approach is crucial because low refrigerant pressure can indicate that there is a leak in the system. Adding refrigerant without first identifying and fixing a leak would lead to a temporary solution that doesn't address the underlying problem.

If a leak exists, simply supplementing the refrigerant will not resolve the issue and can potentially lead to environmental harm and further efficiency losses in the system. By repairing leaks first, you not only restore the integrity of the refrigeration cycle but also ensure that the system operates efficiently and effectively.

Maintaining the system's refrigerant charge is essential for optimal performance, and understanding the root cause of low refrigerant pressure is key to maintaining the longevity and reliability of the HVAC system.