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How Long Will my Furnace Last Before I Need to Replace It?

“How long will my furnace last?” It’s a sensible question, and one that we get asked often.

We reckon most home furnaces and heat pumps will last between 20 and 30 years.

While this is typical, a person could need a furnace replacement as soon as 15 years. However, age is never a good reason for a new furnace installation on its own, as it is not unheard of for a well-maintained unit to be going strong well past 40 years old.

Your furnace does not have an expiration date. Nonetheless, there are certain telltale signs that you do need a replacement.

1. Energy Efficiency

Over the last 20 years, furnace efficiency has improved greatly. Switching to a newer heating unit can cut your utility costs and improve your indoor air quality. That said, you do need to consider the cost over the life of the unit. Sometimes, if maintenance costs are not an issue, the environmentally friendly choice is keeping your old unit.

2. Frequent Repairs

The most obvious sign that you need a furnace replacement is frequent repairs. Once your annual maintenance costs start to exceed 10 percent of a new furnace installation, it is time to consider a new one. Most new natural gas furnaces cost around $14,000, and you can expect to pay $5,000 to $7,500 if you at looking at a new heat pump.

3. Heating Costs

There are many reasons why your heating costs are going up. It is not specifically a signal that you need a heating unit. But, if there is a sudden and drastic increase in heating costs, you should have a professional evaluate your unit. The are many internal parts that can wear out and require replacement.

4. Strange Noises

Are you hearing any rattling, popping, or banging when your heating unit turns on? Over time, all furnaces will start making noises. This is a sign of aging and a signal that the unit is approaching the end of its life expectancy. Another sign is if your heater turns on and off frequently.

5. Adjusting the Thermostat

Are you finding that some rooms are always too hot or too cold, forcing to constantly adjust the thermostat? Aging is not the only cause of this issue, but it is one possible explanation. If you are continually tweaking your thermostat’s setting, it is best to have a heating professional perform an inspection.


What haven’t we covered yet that is important to you?

If you would like to talk about how long your furnace will last before you need to replace it, or other HVAC related topics, please Contact us at (651) 294-7798.

We cover Blaine, Bloomington, Brooklyn Park, Eagan, Edina, Hastings, Maplewood, Minneapolis, Minnetonka, Roseville, North Saint Paul, Saint Paul, Saint Paul Park, South Saint Paul, Stillwater, West Lakeland, West Saint Paul, White Bear Lake, Woodbury, and many more locations.

Can’t find your town listed? Contact us at (651) 294-7798 to tell us where you live, so we can help you.

Schedule a HVAC repair anywhere in the Minneapolis or St. Paul area today by calling (651) 294-7798 or by requesting an estimate online.


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1220 Cope Avenue East, Maplewood, MN 55109