Should I Replace My Furnace and Air Conditioner At the Same Time?

(Last updated: August 4, 2026)

Should you replace your furnace and AC at the same time? At Amarillo Air, we replace countless HVAC systems each year, and this is one of the most common questions we receive. Learn when to (and when not to) replace your furnace and air conditioner, when it makes sense to replace both at once, and the benefits of installing new HVAC systems in your home.

Key Takeaways

• Furnaces typically have longer lifespans than air conditioners, so you may want to replace your AC before your furnace.
• If your furnace and AC are both outdated, undersized, or showing wear, it’s worth replacing both at once.
• Replacing your entire HVAC system can lower costs, improve warranty coverage, and ensure high efficiency and reliability.
• Amarillo Air is here to help you replace part or all of your HVAC system in Potter or Randall County.

When To Replace an Air Conditioner Without Replacing the Furnace

You can replace an air conditioner without replacing a furnace. Furnaces last 15 to 20 years on average, while air conditioners last 10 to 15 years. Both systems don’t necessarily need to be replaced simultaneously, even if they were installed at the same time. If you’ve been noticing signs that you’re ready for an AC replacement but your furnace is still within its normal lifespan and isn’t experiencing issues, you can replace your AC while continuing to rely on your home’s heater for a few more years.

When It Makes Sense to Replace Both AC and Furnace at the Same Time

Simultaneously replacing a furnace and an AC makes sense if:

• One or both of them are the wrong size for your home.
• You want both systems to communicate well with a new smart home system or programmable thermostat.
• Both units are over 10 years old or are showing signs of wear. 
• You plan on selling your home in the next few years (a new HVAC system adds value).

Ultimately, the choice is yours. You should never feel pressured to purchase a new furnace or replace your air conditioner if you’re not ready to do so. At Amarillo Air, we’ll never try to upsell you on a system you don’t need. We’re here to provide factual information so you can make an informed decision. 

If you’re in Northern Texas and you’re ready to choose a brand-new air conditioner or you want to replace your entire HVAC system, call Amarillo Air. We’ll help you choose the right replacements for your needs and set up an installation time that works for you. Your home is in good hands when you choose Amarillo Air.

Benefits of Replacing Your Entire HVAC System Together

While it may feel like a big investment to replace your AC and furnace at the same time, it’s well worth the cost when you consider the advantages, especially if your system is getting older. These are some of the biggest benefits of replacing your furnace and air conditioner at the same time.

Compatibility

Your heating and cooling units work together more than you may realize, and when they don’t, you risk inefficiencies and much more wear and tear. Manufacturers create their HVAC systems to cooperate well, so you’ll get the best performance if you choose an AC replacement and a new furnace from the same company at the same time.

Cost

When you’re considering replacing the furnace and AC at the same time, cost is a major factor in your decision. Labor, time, disposal of the old units, and the complexity of the job all contribute to HVAC replacement costs. If the crew is already at your home working, you’ll save on all of these factors by installing both at the same time.

At Amarillo Air, we offer helpful financing options to remove the financial stress of this decision, allowing you to make the choice that’s best for you, rather than going with the cheapest option. 

Warranties

Some manufacturers stipulate in their warranties that the furnace and air conditioner must be from the same matching set. Otherwise, the warranty is voided because the system was designed to work in a specific way with specific equipment. This would mean you’d have to pay for repairs that would have otherwise been covered by the manufacturer. 

Efficiency

Modern heaters and air conditioners adhere to updated efficiency standards and are likely to outperform their older counterparts. It’s often worth it to install energy-efficient units because you’ll save money on your power bills and enjoy better home comfort year-round.

Convenience

If you don’t replace both the furnace and AC at the same time, the older unit will eventually break down. You’ll have to deal with another consultation, choosing a new heating system or local AC installation team, and scheduling installation again. It’s much more convenient to have it all done at once. 

Average Price Ranges for Combined Furnace and AC Installation

Installing a brand-new HVAC system is a big job and can range from $7,500 to $20,000 on average, depending on factors like:

• Efficiency, BTUs, brand, and type of heater and AC.
• Your home size and the installation complexity.
• Whether new ductwork is required.
• If you’re adding features like advanced air filtration or a dehumidifier.

When you call us because you’re noticing the signs that you need a new furnace or air conditioner, we’ll dispatch a skilled HVAC technician to speak with you about your needs. They’ll help calculate the correct-size system for your home and go over your options, offering accurate price quotes so you know exactly what to expect.

Call Amarillo Air Today To Schedule Your HVAC Service 

If you live in Potter or Randall County and are interested in upgrading all or part of your HVAC system, Amarillo Air is available now to assist you. We’re the leading locally-owned HVAC company in our area, with more than 65 years of experience. Contact us today to speak to an expert for no-nonsense advice on your HVAC system and whether it’s time for an upgrade. You’ll be impressed with our service and our professionalism, guaranteed.