In San Antonio, it is easy to forget about your furnace. It sits quietly for most of the year, then gets asked to work nonstop the moment a cold front rolls in. If your system is getting older, the first freeze of the season is usually when it lets you know. Here is how to tell whether your furnace has a few more winters left or whether it is time to plan a replacement.
How Long Does a Furnace Last?
Most gas furnaces last about 15 to 20 years with regular maintenance. Heat pumps, which heat and cool your home, typically last 10 to 15 years because they run almost year-round.
San Antonio furnaces often reach the upper end of that range because they run fewer hours than furnaces up north. Age still matters, though. Parts like the heat exchanger, ignitor, and blower motor wear out over time, and older systems are far less efficient than today’s models.
Not sure how old your furnace is? Check the label inside the furnace panel. The manufacture date is usually printed on it or built into the serial number.
7 Signs It May Be Time to Replace Your Furnace
- It is 15 years old or more. Even if it still runs, an older furnace is more likely to break down when you need it most.
- Repairs are becoming frequent. If you have called for repairs more than once in the last two winters, the next failure is probably not far off.
- Your heating bills keep climbing. An aging furnace has to run longer to heat your home, and your bill shows it.
- Some rooms never get warm. Uneven heating can mean your furnace can no longer keep up with your home.
- You hear new noises. Banging, rattling, or squealing often points to worn parts inside the system.
- The burner flame is yellow instead of blue. This can be a sign of incomplete combustion. Have it checked right away, and make sure your carbon monoxide detectors work.
- A technician finds a cracked heat exchanger. A crack can allow carbon monoxide into your home. In most cases, it means the furnace should be replaced.
Repair or Replace? A Simple Way to Decide
Many technicians use the 5,000 rule as a starting point: multiply the age of your furnace by the cost of the repair. If the result is more than 5,000, replacement is usually the better investment. For example, a 12-year-old furnace with a $500 repair gives you 6,000, so it is worth considering a new system.
Other questions to ask yourself:
- Will this repair fix the problem, or is it one of several failing parts?
- How much longer do you plan to stay in your home?
- Would a more efficient system lower your energy bills?
- Is your furnace safe to keep running?
What Does Furnace Replacement Cost in San Antonio?
The cost depends on the size of your home, the type and efficiency of the system you choose, and whether your ductwork or gas line need updates. For a full breakdown, see our guide to the cost of installing a furnace in San Antonio. Financing is available with approved credit, so replacing an unreliable system does not have to wait.
Should You Consider a Heat Pump Instead?
With San Antonio’s mild winters, many homeowners are replacing their old furnace and AC with a single heat pump that handles both. Today’s heat pumps work well in our climate and can lower your energy use. Learn more about heat pump installation.
Don’t Wait for the First Freeze
This winter, forecasters expect a strong El Niño, which usually means a wetter season in South-Central Texas with the risk of sudden cold snaps. The worst time to find out your furnace is done is the night temperatures drop below freezing, when every HVAC company in town is booked.
If your furnace is showing its age, Jon Wayne can help you weigh your options with upfront pricing and no pressure. Schedule a furnace repair visit, explore furnace installation and replacement, or call (210) 239-2892.