Should I Replace My 30-Year-Old Furnace?

Should You Replace Your 30-Year-Old Furnace Review

Written By: Alexis Bennett

Edited by: Andrew Dunn

Looking for accurate cost information for replacing your ancient furnace?

Perfect you’re in the right spot. In this guide you’ll learn:

  • What will it cost to replace my furnace?
  • Should I look at repairing rather than replacing a 30-year-old furnace?
  • Will a home warranty help with the cost of repair or replacement of a furnace?
  • …. and answers to all your questions about what to do about your aging furnace.

Your furnace has been a workhorse for years, serving you and your family well. But lately, you’ve been noticing that your home isn’t staying as warm, or your home energy bill is on the rise, and it’s not just the price of fuel or electricity. 

You’ve been asking yourself-should I replace this furnace before it becomes an antique, or worse, stops running in the middle of a cold snap? 

To ensure you aren’t left out in the cold and to keep heating bills as low as possible, maybe it’s time for a new furnace.

Average Cost To Replace a Furnace?

Your 30+year-old furnace just cannot compete with today’s high-efficiency furnaces. The average lifespan of a furnace is 15-20 years, so at 30, you are already beating the odds. Replacing it before it completely gives up the ghost is ideal, rather than waiting for it to just die on some cold, winter night. But short of total breakdown, how do you know when to say goodbye to the old unit?

There’s a lot to consider when replacing your furnace. You need to think about annual fuel utilization efficiency, or AFUE ratings, energy-star ratings, seers, BTUs, and many other factors to find the most cost-effective heating system and high-efficiency models of a furnace. 

Maybe the old system used home heating oil as the fuel, but you’d like to switch to cleaner, cheaper natural gas. A new unit should focus on greater energy efficiency. A more efficient model may cost more upfront but can save money on heating costs in the long run. 

But what will it cost to replace that furnace? It depends on what type of energy source you are using. Here is a breakdown of the average costs for replacing a furnace. Prices will vary from region to region, so when the time comes be sure to get a few quotes for the most accurate numbers where you live. 

If you’re looking for a trusted, industry-leading home warranty company, we recommend Choice Home Warranty. Choice Home Warranty is an industry leader in providing home warranties for HVAC systems, and right now you can take advantage of their current promotions that get you $50 Off + 1 Free Month and Free 30-Day Cancellation. Get a free online quote or contact a specialist at 929-400-6169 before these deals end.

Your next best option is American Home Shield which offers $50 Off and The Service Fee of Your Choice. Get a free quote online or request more information directly at 866-464-7521.

Electric Furnace

If you are replacing an electric furnace or moving up from a heat pump to an electric furnace, you are lucky to be on the less expensive end of the furnace replacement spectrum. For just replacing the furnace itself, costs can run from $700 to $2,800. If you are installing a whole new system, it can run between $1,600 and $3,200. Handyman replaces a furnace filter with a clean one. Should you replace your 30-year-old furnace?

Gas Furnace

The cost to replace a gas furnace can range anywhere from $2,000 to $6,500, depending on your home size and the manufacturer of the furnace. But for savings on your gas bill, it can be well worth the expense in the long run. If you are installing a whole new system including new ductwork, etc. you can expect to pay between $3,000 and $8,000. 

Oil Furnace

An oil furnace is one of the more expensive options. A simple replacement of the furnace unit itself will run between $1,800 – $5,000. If you are replacing ductwork and doing a completely new install (say moving from radiant heat to forced air) the cost can run from $5,000 to $9,000.

Other Considerations

COVID-19 has brought attention this year to clean air systems. Concerns over coronavirus might lead you to consider filtration systems. Installing either a HEPA air filter or a humidifier in your ductwork can cost between $600 and $1,000.

Repair vs Replacement of a 30-Year-Old Furnace?

Should you repair or replace your aging furnace? Repair is usually cheaper, but with such an old system, how many repairs are going to be needed? Is it better to just replace it now and avoid those multiple repair costs over the next few years? Before you decide, here is a handy tutorial on the most common furnace problems and how to fix them.

Also, if money is tight, consider this: for qualified homeowners, federal programs like LIHEAP can offer assistance with costs related to repair and replacement of your old furnace. You can get assistance with repairs or even the installation of a new system. 

According to, repair costs can range from $100s to $1,000 or more. The older the unit, the more likely the cost will be higher.

Here are a few examples of average costs for repairing specific problems with a furnace:

  • Thermocouple – $100-$250
  • Thermostat – $100-$600
  • Blower Motor Capacitor – $150-$450
  • Igniter – $150-$300
  • Heat Exchanger – $100-$200 for repair, or up to $1,500 for replacing the exchanger
  • Gas Valve – $200-$1,000

You can see that most individual repairs cost much less than replacement. But when you factor in age, lack of efficiency, and overall aggravation, deciding between repair and replacement isn’t always easy. 

One path forward that can make this decision less complicated might be a warranty. Let’s take a look at your options there. 

What’s The Cost To Repair an older Furnace If You Have A Warranty?

Manufacturer’s Warranty

For a newer furnace, this would be a great option. But at 30 years old, your manufacturer’s warranty is out of the picture. 

Home Warranty

A home warranty will cover your HVAC system furnace and air conditioning, along with many other home systems and appliances. So you get some bang for your buck if you have an older system that is working but showing signs of wear and tear. Understand that with a home warranty on a furnace, you are unlikely to be compensated for an old one with pre-existing conditions – so if it’s already broken down and you don’t have a home warranty, getting a home warranty now isn’t going to help you.

Be aware of the coverage limits on a home warranty, which may cover some repairs or partial replacement, but are unlikely to cover the entire cost of replacement, especially for oil and gas systems. For instance, American Home Shield will pay up to $1,500 for covered breakages. For whatever home warranty plan you might choose, be sure to read the service contract carefully. 

What a home warranty will do is provide peace of mind.  

Did You Know Should I Replace My 30 Year Old Furnace Facts

DIY vs Hiring A Professional To Replace a 30-Year-Old Furnace?

DIY Replacement

For replacing a whole furnace, you really should have someone who knows what they are doing. If you have a relative or buddy who is in the HVAC industry, by all means, enlist their help in the replacement of your furnace. But if you are a home repair novice, this is not something you’ll want to tackle on your own.

But if you and your uncle or friend decide to tackle this on a weekend, you can save some money for sure. You might want to consult a furnace replacement guide or similar resource before tackling the job. The unit itself can cost anywhere from a few thousand up to $8,000+ for a Trane gas furnace. 

An electric furnace will be significantly cheaper, from around $700 to around $2,000. 

Professional Replacement

Labor costs will, of course, add to the overall cost of furnace replacement. But for an efficient furnace to replace your tired current furnace, calling in the pros might be the way to go. In terms of home improvement spending, having a professionally installed furnace is a good move. 

When it comes to finding that professional, be sure to check references, ask about licenses and professional credentials they hold and get everything in writing.  

Final Thoughts on Replacing a 30-Year-Old Furnace

Well, that old hunk of metal has served you well. Replacing it will be a big deal. Your home will be more comfortable, and your energy bill will be lower. But it’s a big outlay of cash to consider, for sure. With the right information gathered, you will have the tools you need to make the right decision for you and your family.