Furnace Replacement
San Antonio, TX
An old furnace runs less efficiently every year. We replace it with a high-efficiency Carrier unit — sized right, installed right, backed by warranty.
Furnace Replacement in San Antonio
San Antonio winters are mild compared to the rest of the country — but when a cold front drops temps into the 20s in January, your furnace needs to perform. An aging furnace doesn't just underperform in the cold; it runs at lower efficiency all year, costing you on every gas bill.
Good Times HVAC replaces gas and electric furnaces with high-efficiency Carrier systems. Jimmy Crenshaw and Austin Privett assess your existing ductwork, heat exchanger condition, and fuel type before recommending a replacement — so you get a system that actually fits your home and your budget.
Because San Antonio winters are short, furnaces here often last 18–25 years — far longer than in northern climates. But a furnace that old is running at 60–70% AFUE efficiency at best. A modern 95–98% AFUE system cuts your gas heating bill significantly and reduces CO risk from aged heat exchangers.
Furnace Types We Install in San Antonio
- Gas furnaces (most common) — 80% AFUE single-stage for budget-conscious replacements. 95–98% AFUE two-stage and variable-speed for maximum efficiency. CPS Energy/Atmos customers can take advantage of rebates on high-AFUE units.
- Electric furnaces — For homes without natural gas lines or where a heat pump air handler makes more sense than a gas unit. Paired with a heat pump for maximum efficiency.
- Heat pump systems — Replacing a traditional furnace + AC combination with a single heat pump that handles both. See our Heat Pump Services page for details.
- Dual-fuel systems — Heat pump for mild weather efficiency + gas furnace backup for hard freezes. The best of both worlds for San Antonio's climate variability.
When to Repair vs. Replace Your Furnace
San Antonio's mild winters mean furnaces don't get the heavy use that drives replacement in northern climates. Use these guidelines:
- Repair if: System is under 15 years old, no heat exchanger damage, repair cost under $800, and no persistent ignition issues
- Replace if: System is 18+ years old, cracked or damaged heat exchanger (CO risk), repair cost exceeds $1,000, or multiple ignition failures in the past 2 years
- Always replace if: Yellow or flickering flame (incomplete combustion), visible cracks in heat exchanger, CO detector triggered
Efficiency Ratings for San Antonio's Climate
Because San Antonio heating seasons are short (typically November through March), the ROI on ultra-high efficiency furnaces is lower here than in northern markets. Our recommendations:
- 80% AFUE — Cost-effective for San Antonio. Sufficient efficiency for a short heating season. Best choice on a budget.
- 95–96% AFUE two-stage — Meaningful savings on gas bills, quieter operation, better temperature control. Best balance of cost and efficiency for SA climate.
- 98% AFUE variable-speed — Maximum efficiency, best comfort, qualifies for manufacturer rebates. Makes most financial sense in homes with large gas bills or if natural gas prices are high.
Signs Your Furnace Needs Replacement
- System is 18+ years old
- Yellow or flickering burner flame (carbon monoxide risk)
- Cracked or damaged heat exchanger
- Persistent ignition or pilot light failures
- Uneven heating across rooms
- Rising gas bills with no explanation
- Repair estimate exceeds 50% of replacement cost
- System short-cycles or runs in short, ineffective bursts
Replacement Process
Assessment
We inspect heat exchanger, flue, gas lines, and ductwork before recommending a unit. No assumptions.
Right-Size System
BTU output matched to your home — not oversized, not underpowered. We calculate, not guess.
One-Day Install
Old unit removed, new unit installed, all connections tested, flue verified safe. Most replacements are complete in one day.
Warranty Registration
Carrier 10-year parts warranty registered. 12-month labor guarantee from Good Times HVAC.
Frequently Asked Questions
How long do furnaces last in San Antonio?
Furnaces in San Antonio often last 18–25 years due to light winter use. Cracked heat exchangers, ignition failures, and rising gas consumption signal it's time to replace — regardless of age.
Should I replace my furnace and AC together?
If both systems are aging, replacing together avoids compatibility issues, often reduces total cost, and allows for a matched-efficiency system that performs optimally. We'll give you an honest comparison either way.
What is AFUE and what should I aim for?
AFUE measures furnace efficiency. Older units run 60–70%. Modern high-efficiency units run 95–98% AFUE, significantly lowering your gas bill. For San Antonio's short heating season, 80–96% AFUE is usually the right range.
Is a cracked heat exchanger dangerous?
Yes. A cracked heat exchanger allows combustion gases including carbon monoxide to enter your air supply. This is a safety emergency — call us immediately. Do not operate the furnace until the heat exchanger is inspected and confirmed safe.
Why San Antonio Homeowners Choose Good Times HVAC for Furnace Replacement
Honest Repair vs. Replace Advice
We inspect your existing furnace thoroughly before recommending replacement. If repair is the right call, we'll tell you. We don't push replacements to pad invoices.
Safety First
Every furnace replacement includes full flue inspection, gas line check, and combustion verification. We don't cut corners on gas safety.
All Fuel Types
Gas, electric, heat pump, dual-fuel — we install and replace all system types. One call covers your heating decision from start to finish.
10-Year Carrier Warranty
As an authorized dealer, we install with full manufacturer warranty coverage. We handle the registration — you just enjoy the warmth.
Old Furnace Costing You Every Month?
We'll assess it honestly and give you the right answer — repair or replace. No pressure.
(210) 760-6407