The better care you take of your heating system, the longer it will last. The International Association of Certified Home Inspectors estimates the following lifespans for heating systems:
Heat exchanger: 10-15 years
Heat pump: 10-15 years
Furnace: 15-25 years
Electric radiant heater: 40 years
If your heating system is broken, hire a contractor or a repair service to take a look at it. They can help you determine if it makes financial sense to replace your system or spend money on repairs. The good news is that replacing your old furnace will give you the opportunity to take advantage of newer, more efficient furnaces that can save you money on heating bills from the first cycle.