The answer to 'how long does air conditioner last' is that a typical central air conditioning unit lasts 15-20 years with proper maintenance. However, the lifespan can vary depending on factors like the unit's quality, how often it's used, and how well it's maintained.
Well-maintained air conditioners on the higher end of that range can last up to 20 years, while those that are not serviced regularly may only last 10-15 years. Proper annual maintenance like changing air filters, cleaning the coils, and checking refrigerant levels can extend the unit's lifespan significantly.