It really depends on the quality of the heater and how well it is maintained. Pool heaters usually last anywhere from 5 to 10 years, but they can last longer with proper care. If your pool heater is not working, you may need to have it repaired or replaced.

It depends on the type of pool heater. Gas heaters usually last about 10 years, electric heaters usually last about 5 years, and solar panels usually last about 25 years. However, it's important to keep in mind that these are just general guidelines - the lifespan of a pool heater may vary depending on the quality of the unit, how well it's maintained, and other factors.