When should refrigerant levels in an HVAC system be checked?

Refrigerant levels in an HVAC system should be checked when cooling performance declines because this is often an indication of potential issues within the system. Low refrigerant levels can lead to inadequate cooling, increased energy consumption, and can cause damage to the compressor if left unaddressed. By monitoring the refrigerant levels when performance issues arise, technicians can identify if there's a leak or if the system is undercharged, allowing for timely repairs and maintenance to restore the system's efficiency.

While it is important to perform yearly maintenance on an HVAC system, simply checking the refrigerant levels only during these scheduled visits may overlook problems that can arise at any time throughout the year. Checking levels while the system is running can be valuable for immediate diagnostics, but assessing them primarily when performance issues are evident ensures that any existing problems are dealt with proactively. After a power outage may be relevant in some situations, but the most critical time to check refrigerant levels remains during periods of diminished cooling effectiveness. This approach focuses on maintaining optimal system performance and prolonging the life of the HVAC unit.