The answer to 'when to replace condenser' is that you should typically replace your air conditioning condenser unit every 10-15 years, or when it starts exhibiting signs of wear and tear. The condenser is the outdoor component of your HVAC system that removes heat from your home, and over time it can become less efficient or even stop working altogether.
Some key signs it may be time to replace your condenser include reduced cooling power, higher energy bills, loud or unusual noises, and visible damage or corrosion. Regular maintenance can help extend the lifespan of your condenser, but eventually all HVAC components need to be replaced. Consulting a professional HVAC technician is the best way to assess the condition of your system and determine if a full condenser replacement is necessary.