Should I Repair or Replace my HVAC?

how to know when it's time to replace it

When is it time to replace my HVAC system vs repairing?

No one wants to spend money replacing something if they don’t have to; especially an HVAC unit. But determining the right time to replace versus repair an HVAC system in Greenville, South Carolina, can be a tricky endeavor. That decision involves a combination of factors related to the system’s age, performance, and efficiency which can all impact your wallet. And rather than simply saying call a pro, let’s dive into a few things you, the homeowner, can use to make an educated decision.

Key Factors to Consider

Age of the System:

While age of the system is a primary indicator, there is still a little wiggle room here. If a system has been well maintained, you may get a longer lifespan out of it.

  • Replace – HVAC systems typically have a lifespan of 15-20 years. As systems age, they become less efficient and more prone to breakdowns. If your system is over 15 years old, it’s worth evaluating its performance and considering an upgrade.
  • Repair – If your system is still under a manufacturer parts warranty (5-10 years), repairing is typically the right choice.

Frequency of Costly repairs:

With machines, comes maintenance. And while having the occasional repair is no indicator that you need a replacement, if you’re constantly having to call the HVAC company, then it might be time to consider it.

  • Replace – If you find yourself repeatedly calling for major HVAC repairs, it may be more cost-effective to invest in a new system.
  • Repair – If your HVAC system needs typical consumable parts (capacitor, contactor).

Decreased Efficiency:

Now this one may actually require an HVAC Pro. As systems age, they tend to lose efficiency as parts wear. There are 2 typical ways that you’ll see this efficiency loss: on a regular maintenance report from your HVAC technician and potentially with an increase in your energy consumption (those kWh (kilowatt hours) on your electric bill.

  • Replace – Older HVAC systems tend to operate less efficiently than newer models. This can be seen with readings an HVAC technician does during routine maintenance.
  • Repair – Younger systems may have a component that is not operating efficiently but the rest of the system is working properly.

Rising energy bills:

Over time you’ll see a pattern in your energy bills. If your energy bill is slowly increasing over time or suddenly has a large increase, it may be worth taking a look at your HVAC system.

  • Replace – A significant increase in energy bills may indicate that your older HVAC system is no longer operating at peak efficiency.
  • Repair – If there is a simple component out of range or not operating correctly, like your thermostat.

Potential Cost Savings with a New HVAC System:

Now that you have an idea of whether or not you’re in need of replacing your HVAC system, there is a bright side. With newer systems, there is new technology and increased efficiency. Both of those things create opportunities for cost savings. But that’s not all. Here’s a few potential cost savings with a new HVAC.

Energy Efficiency:

Older HVAC systems are often less energy-efficient, resulting in higher energy consumption and increased utility bills. Newer systems, especially those with ENERGY STAR certification, are designed to meet strict efficiency standards. Upgrading can lead to significant cost savings by reducing monthly energy expenses.

Lower Repair Costs:

An aging HVAC system is likely to require more frequent and costly repairs. Investing in a new system means fewer repair expenses, contributing to long-term savings. New systems also typically come with warranties, providing added financial protection.

Tax Incentives & Rebates:

Upgrading to a more energy-efficient HVAC system may qualify you for tax incentives, like rebates and credits. Local and federal governments, as well as utility companies, often offer incentives to encourage the adoption of energy-efficient technologies. These incentives can help offset the upfront cost of a new system.

Increased Home Value:

A modern and energy-efficient HVAC system can enhance the overall value of your home. Potential homebuyers are often willing to pay more for a property with updated and efficient heating and cooling systems, providing a return on your investment.

Improved Comfort & Air Quality:

Improved Comfort and Air Quality: New HVAC systems come with advanced features such as smart thermostats, zoning options, and improved air filtration. These features not only enhance comfort but also contribute to better indoor air quality. Investing in a system that promotes a healthier and more comfortable living environment can be invaluable.

New Technology:

Technological advancements in HVAC systems have led to increased efficiency, better performance, and enhanced comfort. If your system lacks modern features or uses outdated technology, upgrading to a newer model can provide improved functionality.

Still unsure about what’s right for your HVAC System?

The most effective way to determine if your system simply needs repairs or if a replacement is in your best interest, consult with local a HVAC professional. They’ll be able to provide a comprehensive assessment and personalized recommendations.

At Home Service Nerds Heating & Air we will help guide you through the process, helping you choose the right system for your needs and ensuring optimal efficiency and savings in the long run.

During a consultation, our HVAC experts can:

  • Evaluate the current condition and efficiency of your existing system.
  • Discuss your heating and cooling requirements.
  • Provide recommendations to compare repairs vs replacement.
  • Estimate installation costs and potential savings on energy bills.


In Greenville, South Carolina, replacing an HVAC system over 15 years old is advisable when considering factors like age, efficiency, and repair costs. The potential cost savings with a new system are substantial, encompassing reduced energy bills, lower repair expenses, potential tax incentives, increased home value, and improved overall comfort.

Need some nerd help?

We’re happy to answer any questions you have. Give us a call.

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