The answer to 'when to replace mini split' is that mini split air conditioners typically last 10-15 years with proper maintenance. However, there are several signs that indicate it may be time to replace your mini split system, including:
Reduced efficiency: If your mini split is no longer cooling your home as effectively or is using significantly more energy, it may be time for a replacement. As HVAC systems age, they become less efficient.
Frequent breakdowns: If your mini split is requiring more and more frequent repairs, it's a sign that the system is nearing the end of its lifespan and may need to be replaced.