The answer to 'when to replace mini split' is that mini split systems typically last 10-15 years with proper maintenance. However, there are several factors that can impact the lifespan of a mini split, including the climate, usage, and maintenance. Over time, the compressor, coils, and other components can wear down and lose efficiency, leading to higher energy bills and the need for more frequent repairs.
In general, it's recommended to replace a mini split system every 10-15 years, or sooner if you notice a significant decline in performance or a spike in your energy costs. Paying attention to warning signs like strange noises, insufficient cooling/heating, and increased energy usage can help you determine when it's time to replace your mini split.