Deciding whether to replace your entire HVAC or simply a component of it, like a new air conditioner, can be difficult. After all, it’s not always a one-size-fits-all situation. You have lots of choices, and they depend heavily on the current state of your existing system.

Some homes might only need partial upgrades, like a new air conditioner, furnace, or an updated thermostat, to boost efficiency and performance. On the other hand, making full upgrades means replacing the entire HVAC system. This could be the way to go if your current system is old, consistently underperforming during the summer heat and winter cold, or racking up high energy bills.

No matter which way you decide to go, Frontdoor can help.  The New HVAC Program – available with Frontdoor Unlimted Membership – gives you access to our national buying power to save thousands* off national retail pricing on a new HVAC system, whether it's a full or partial replacement.

Pros and cons of a partial upgrade

A partial HVAC upgrade is a great option when parts of your system are still in good shape. For example, if you have a newer, functioning furnace but an aging air conditioner, just replacing the air conditioner can be both practical and cost-effective. Because full HVAC replacement costs are much higher, this approach is also beneficial for those on a tighter budget. You can still achieve significant system improvements without the full cost of a complete overhaul.

Pros of a partial upgrade:
  • Cost savings: You're only replacing what needs to be replaced, which can be less expensive than a full system overhaul.
  • Targeted improvements: A partial upgrade allows you to address specific issues or inefficiencies in your system, such as improved air quality in your home.
Cons of a partial upgrade:
  • Compatibility issues: Aside from regular maintenance of your HVAC systems, it’s sometimes challenging to achieve compatibility between new and old components. Mismatched parts can lead to inefficiencies or additional wear and tear.
  • Lesser long-term savings: While a partial upgrade is more affordable upfront, it may not offer the same long-term energy savings as a full system replacement.

As always, it’s important to weigh these benefits against the potential drawbacks of compatibility and long-term efficiency. The best solution is the one that fits the unique needs of your home and lifestyle.

Pros and cons of a full HVAC upgrade

A full HVAC upgrade involves replacing your entire heating, ventilation, and air conditioning system, and it's often the best route when your current system is outdated or consistently underperforming. Every part of your system will be new, efficient and working in harmony. It is worth noting that ductwork is typically not part of a full HVAC replacement.

Pros of a full upgrade::
  • Long-term energy savings: Modern, efficient systems mean significant long-term savings on HVAC energy consumption.
  • Reduced repair needs: With everything new, the likelihood of needing repairs drops significantly.
Cons of a full upgrade:
  • Higher initial investment: The most significant drawback is the cost of a new HVAC system, which is significantly higher than a partial upgrade.
  • Potential for disruption during installation: Replacing an entire HVAC system can be a little disruptive, so if you can, it's best to schedule your replacement before it gets too hot or cold outside.

Opting for a full HVAC upgrade involves weighing these pros and cons, considering both the immediate impact and long-term benefits for your home. Also, Frontdoor makes a full upgrade more affordable because your quote includes installation of the new system and removal of the old one.

New HVAC Program helps take the worry away

Once you make a decision, Frontdoor can help make it easier and more affordable. The New HVAC Program, available to Unlimited Members, gives you access to customized options and quotes based on your specific needs and with financing options available*, you can get the system you need now and take advantage of an affordable monthly payment plan.**

Join Frontdoor Unlimited today to access the New HVAC Program, as well as other member discounts and benefits. If you're already an Unlimited member, simply open the Frontdoor app to sign up for your free in-home HVAC assessment.

The New HVAC Program is offered by Frontdoor Pro and performed by a Frontdoor Pro independent service contractor. For Frontdoor Pro license numbers, please visit

*Financing provided by an independent financing company not affiliated with Frontdoor or Frontdoor Pro.

**Pricing and amount of savings will vary based on location and equipment availability. Not available in all areas.