The answer to 'when to replace furnace' is that most furnaces have a lifespan of 15-20 years. If your furnace is older than 15 years, it's a good idea to start planning for a replacement. As furnaces age, they become less efficient and more prone to breakdowns, which can lead to higher energy bills and more frequent repairs.
Some key signs it may be time to replace your furnace include:
- Furnace is over 15 years old
- Furnace is no longer heating your home effectively
- Frequent breakdowns and repair needs
- Significantly higher energy bills
- Increased dust, soot, or other indoor air quality issues