Furnace Repair & Replacement in Kingsland, Austin & the Hill Country
Gas or electric, old or new — O2 Kool repairs, inspects, and replaces furnaces across Central Texas. Honest repair-vs-replace assessment, full combustion and CO safety testing on every gas system, high-efficiency replacement options, and financing available.
Should I repair or replace my furnace in Kingsland, Texas?
Repair your furnace if it's under 15 years old, the repair cost is less than 50% of a new system, and the heat exchanger is safe and uncracked. Replace it if the heat exchanger is cracked, the furnace is 15+ years old with rising repair costs, or you're seeing multiple failures per season. O2 Kool performs full combustion analysis and heat exchanger inspection on every gas furnace we service, so the recommendation is based on actual system condition — not guesswork.
Common Furnace Problems We Repair
Furnace Won't Ignite
Hot-surface igniters wear out, flame sensors get dirty, gas valves fail, and control boards lose signal to the burner assembly. We diagnose the actual cause instead of swapping parts.
Cracked Heat Exchanger
A life-safety issue — a cracked heat exchanger can leak carbon monoxide into the home. We inspect every gas furnace we service for cracks, and never restart one we suspect has failed.
Short Cycling
Furnace turns on, runs briefly, shuts off, repeats. Usually a dirty flame sensor, clogged filter, faulty limit switch, or an oversized furnace. Each fix is different.
Blower Motor Problems
No airflow, weak airflow, screeching, grinding, or the blower running nonstop. Capacitor failures, motor bearings, and control-board signal issues are the common causes.
High Gas Bills
A furnace that has drifted out of spec — wrong gas pressure, dirty burners, low temperature rise — burns more fuel for the same heat. A proper tune-up or repair usually pays back within a billing cycle.
Safety Lockouts
Modern furnaces lock out when a limit switch, rollout switch, pressure switch, or flame sensor detects a problem. We read the error codes, diagnose the root cause, and fix the underlying issue.
Heat Exchangers & Carbon Monoxide
A cracked heat exchanger can leak combustion gases — including carbon monoxide — into the air circulated through your home. It is the most serious failure a gas furnace can have, and it is not a repair-in-place situation.
Every gas furnace O2 Kool services gets a heat exchanger inspection and combustion analysis. If we find a crack, we pull the furnace out of service and walk you through replacement options.
CO Warning Signs in the Home:
- Carbon monoxide detector alarm
- Headaches, nausea, or dizziness that clear when you leave the home
- Yellow or orange flame on a gas furnace (should be blue)
- Soot around the furnace, flue, or registers
- Excessive condensation on windows near the furnace
- A burner flame that flickers when the blower kicks on
If any of these happen, leave the home, ventilate, and call us and your gas utility immediately.
Repair or Replace? An Honest Framework
Signs It's Time to Replace the Furnace
- Furnace is 15+ years old
- Cracked heat exchanger (safety risk — do not operate)
- Multiple major repairs in the past 12 months
- Heating bills rising each season without usage change
- Uneven heating across the home
- Yellow or flickering flame on a gas furnace
- Excessive cycling or long runs without reaching setpoint
- Repair quote approaches half the cost of a new system
- Home extensively renovated since the original install
Higher Efficiency, Lower Gas Bills
Modern 95%+ AFUE condensing furnaces turn nearly every therm of gas into useful heat. An older 80% AFUE unit loses a fifth of your gas bill up the flue.
New Safety Systems
Modern furnaces include more rigorous safety sensors, lockouts, and sealed combustion designs that significantly reduce CO risk compared to older atmospheric furnaces.
Quiet, Consistent Heat
Two-stage and variable-speed gas furnaces run longer at lower output — quieter, with tighter temperature control and fewer cold spots throughout the home.
Warranty Reset
A new furnace typically carries a 10-year parts warranty (with registration) plus labor warranty from O2 Kool. Peace of mind for a full decade.
Furnace Services We Provide
Home Furnace Service
Single-family homes, lake houses, condos, and rentals across Kingsland, Marble Falls, Horseshoe Bay, Austin, and the greater Hill Country.
Commercial Furnace Service
Offices, retail, restaurants, warehouses, and multi-unit properties with gas or electric heat and packaged rooftop units.
Furnace Service Across Central Texas
Furnace Repair & Replacement — FAQ
How do I know if I need furnace repair or replacement?
General rule: if the system is under 15 years old and the repair cost is less than 50% of a new furnace, repair usually wins. If the system is older, has had multiple repairs, has a cracked heat exchanger, or heating bills keep climbing, replacement is usually more cost-effective. O2 Kool gives you an honest recommendation with the math — we win either way, so it's based on your situation.
Is a cracked heat exchanger really that serious?
Yes. A cracked heat exchanger can allow combustion byproducts — including carbon monoxide — to mix with the air being circulated through the home. It's a life-safety issue, not a comfort issue. If we find a crack, we recommend taking the furnace out of service immediately and replacing the heat exchanger or the system.
What AFUE rating should I look for in a new gas furnace?
For Central Texas — where heating runs maybe three to five months a year — a mid-efficiency 90–96% AFUE furnace usually hits the sweet spot between upfront cost and payback. Premium 96–98% AFUE units make sense for larger homes, or buyers planning to stay 10+ years who want maximum efficiency and the longest warranty.
Do you repair both gas and electric furnaces?
Yes. O2 Kool technicians are trained on gas furnaces (all major brands), electric furnaces, heat pumps, packaged HVAC units, and ductless mini-split heat pumps. Whatever you have, we can service it.
How long does furnace replacement take?
A straightforward same-fuel replacement typically takes one day. Replacements that involve gas piping changes, ductwork repairs, or fuel type switches can run two to three days. You'll have a realistic timeline in your written quote before any work starts.
Do you offer financing for furnace replacement?
Yes. O2 Kool offers financing through Wells Fargo and Synchrony Bank. Approved applicants can spread the investment over monthly payments. Call (325) 388-5665 or visit our financing page for current offers.
Ready for Furnace Service or a Replacement Quote?
Call O2 Kool — honest assessment, full safety testing, all brands, financing available.
Furnace service — authoritative guidance
These references help homeowners understand gas furnace safety, efficiency ratings, and replacement decisions.
- U.S. Department of Energy: Furnaces and boilers
AFUE ratings, fuel options, and correct sizing for residential furnaces.
- ENERGY STAR: Furnaces
Compare certified high-efficiency furnace models for your climate zone.
- CDC: Carbon monoxide safety
What to do when a CO alarm sounds and how to prevent exposure from heating equipment.
- NFPA: Home heating safety
Fire and safety considerations for all home heating equipment.