Masonry repair
Sweep & inspection
Caps & crowns
Flue relining
Gas fireplace serviceLevel 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Fast, Reliable Gas Fireplace Repair Across Alamo Heights
A gas fireplace repair in Alamo Heights typically runs $185 – $425 for common fixes like thermocouple replacement, pilot assembly repair, or gas valve adjustment. More involved work, such as installing a dedicated stainless liner for a gas insert, usually lands between $1,200 and $2,800 depending on flue length and access. If your gas logs won’t stay lit, the pilot light keeps going out, or you smell gas or exhaust inside your Alamo Heights home, call us at (903) 515-5079 and a live person will answer, day or night.
We know the older Alamo Heights housing stock better than most. Homes here date largely from the 1920s through the 1960s, and a lot of them still have their original masonry chimneys. When a gas appliance gets tucked into a fireplace built for wood burning decades ago, the repair questions change entirely. That’s the work we do every week in Alamo Heights, from Argyle Avenue to the streets off Broadway and down toward Olmos Park.
Expect a written price before any work begins. Expect a background-checked, identity-verified technician whose name and photo you’ll see before the truck arrives. That’s how Gas Fireplace Repair should work in a neighborhood like this one.
Why Alcott Chimney San Antonio Is Alamo Heights’s Preferred Gas Fireplace Repair Company
Ruben Castellano founded Alcott Chimney in 2002, and the company has operated since day one on a simple rule: the person you’re told to expect is the person who shows up, with a photo ID badge, a uniform, and a background check already on file. For Alamo Heights homeowners who are often home alone, or have young kids, or simply don’t want a stranger at the door, that matters more than a low-ball quote. We don’t do anonymous techs.
Every Alcott repair, including every gas fireplace repair in Alamo Heights, gets a written guarantee. If the repair fails within the coverage period, the second visit is free. That’s not a verbal promise. It’s on paper before we start. We also hand you a written price before any work begins, so the number you approve is the number you pay.
Local experience counts here. The narrow, winding streets, the mature live oaks hanging over rooflines, the custom chimney caps and spark arrestors on so many Alamo Heights chimneys – our crews navigate all of it regularly. We don’t have to figure out your street on the day of the job. We’ve already been there.
Styles & brands we work with
Our Gas Fireplace Repair Services in Alamo Heights
Gas Fireplace Flue Liner Inspection and Replacement
This is the repair we recommend most often in Alamo Heights, and it’s rarely what the homeowner called about. Older masonry chimneys here were built for wood smoke, not gas exhaust. Gas appliances produce cooler, moister exhaust that condenses on old clay tile, creating an acidic slurry that eats at the masonry. When we find that, the fix is a dedicated stainless liner – we install DuraFlex – sized for the gas appliance, not the oversized original flue. You get safer venting and a liner that won’t degrade under gas-use conditions.
Damper Repair and Top-Sealing Damper Installation for Gas Appliances
Dampers on 60- to 90-year-old Alamo Heights fireplaces are often rusted open, rusted shut, or missing pieces entirely. For a gas log set, a failing damper isn’t a minor annoyance. It pulls air backward, trips oxygen-depletion sensors, and lets conditioned air pour out of your house all winter. We repair or replace dampers and, where the gas appliance no longer needs a traditional throat damper, we install top-sealing dampers that keep rain, debris, and critters out while the gas system vents correctly.
Chimney Crown and Flashing Repair to Protect Gas Venting Systems
Many Alamo Heights brick chimneys share a single crown across multiple flues. A hairline crack in that crown lets rainwater into both flues at once. That rusts dampers, corrodes gas valves, and shows up as a musty smell around the firebox after a heavy spring rain. We repair crowns and flashing with professional-grade materials from Olympia Chimney and Famco, then verify the gas appliance fires cleanly afterward. If the crown isn’t right, the gas repair underneath it won’t hold.
Pilot, Thermocouple, and Gas Valve Diagnostics
When a gas fireplace in Alamo Heights won’t light, or lights and then goes out, the cause is usually a failing thermocouple, a dirty pilot assembly, or a gas valve that’s no longer holding pressure correctly. We diagnose all three, quote a firm price, and complete most repairs the same day we’re on site. We carry common parts in the truck and can source Alamo Heights-specific components quickly when needed.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Alamo Heights
We install and service gas fireplaces and venting systems built by the brands chimney professionals actually specify. That includes DuraFlex liner systems, HeatShield resurfacing compounds, Gelco chimney caps and chase covers, and Olympia Chimney components. When an Alamo Heights customer needs a part, we don’t substitute a box-store equivalent. We use what the manufacturer designed for the system. If we have to order something, we’ll tell you the expected arrival date before you approve the work.
Common Gas Fireplace Repair Problems We See in Alamo Heights Homes
- Gas logs in original wood-burning fireboxes without a proper liner. This is the single most common configuration in Alamo Heights, and it’s the one that keeps us busiest. Without a stainless liner, gas exhaust condenses inside the old clay flue, creating acidic moisture that spalls the masonry from the inside out.
- Multi-flue chimneys sharing one cracked crown. Homes with a downstairs gas fireplace and an upstairs wood-burning fireplace often share a single chimney structure. A crack in the shared crown sends rainwater down both flues, rusting dampers and corroding gas valves before the leak is ever visible inside the house.
- Clogged spark arrestors from live oak debris. Alamo Heights trees are beautiful, but they drop leaves, twigs, and acorns onto chimney caps constantly. A clogged spark arrestor on a gas fireplace doesn’t just block airflow. It can trap carbon monoxide inside the home while everything outside looks fine.
- Failing dampers pulling air backward. Gas appliances need positive updraft. A damper that’s warped or rusted partially open lets exhaust back into the firebox, which trips oxygen-depletion sensors and can push combustion byproducts into the room.
See the difference
Before
After
Before
After
Before
AfterPricing for Gas Fireplace Repair in Alamo Heights, TX
For straightforward diagnostics and repairs, plan on $185 – $425 in the Alamo Heights market. That covers thermocouples, pilot assemblies, gas valve adjustments, and damper top-plate replacements. A dedicated stainless liner for a gas insert or log set typically runs $1,200 – $2,800, depending on flue height, roof access, and whether we’re also repairing the crown or flashing while we’re up there. Multi-flue chimneys with complicated access on Alamo Heights’s narrower streets can push toward the upper end of that range.
| Repair Type | Typical Alamo Heights Range |
|---|---|
| Pilot assembly or thermocouple replacement | $185 – $375 |
| Gas valve adjustment or replacement | $250 – $425 |
| Damper top-plate replacement | $210 – $390 |
| Stainless gas liner installation | $1,200 – $2,800 |
| Crown and flashing repair | $400 – $1,100 |
These are honest ranges. We quote a firm, written price before any work starts, and that includes the diagnostic visit. Call (903) 515-5079 for a free estimate on gas fireplace repair in Alamo Heights – the number you hear is the number you’ll pay.
We Also Serve Cities Near Alamo Heights
Our crews work throughout the surrounding area. If you’re in San Antonio, Schertz, Cibolo, or Boerne, the same background-checked Alcott technicians, the same written pricing, and the same 365-Day Done Right Promise apply. Gas fireplace repair techniques don’t change at the county line, but chimney conditions do, and we know the housing stock in each of these communities well.
Serving Alamo Heights, TX - Our Local Coverage Area
We’re based in the Alamo Heights area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs – Gas Fireplace Repair in Alamo Heights
No, it is not safe, and it’s the most common configuration we’re called to correct in Alamo Heights. Gas exhaust is cooler and wetter than wood smoke, and it condenses on the old clay flue tile, creating an acidic slurry that eats the masonry from the inside. The proper fix is a dedicated stainless liner sized for the gas appliance, installed through the existing flue. We recommend a camera inspection first so you can see exactly what’s in the chimney before approving any work. Call (903) 515-5079 to book an inspection.
We repair the gas side by running a dedicated liner through its specific flue, leaving the wood-burning flue untouched. Older Alamo Heights chimneys often have two or three flues inside a single brick structure, each serving a different fireplace. We inspect with a camera first, identify the flue serving the gas appliance, and line only that one. The wood-burning flue can be swept and inspected separately if you plan to keep using it. We’ll show you the video footage and give you a written price for each flue before any work starts.
Rainwater is getting into the flue, and it’s interfering with the gas appliance. The usual culprits in Alamo Heights are a cracked chimney crown, failed flashing where the chimney meets the roof, or a rusted damper letting water pool inside the firebox. The moisture causes the musty smell and can cool the thermocouple enough that the pilot won’t hold. We’d inspect the crown and flashing, repair what’s failed, and confirm the gas system fires cleanly once everything is dry. A gas valve that’s been repeatedly soaked may need replacement, but we’ll tell you if that’s the case after we look.
They can be, yes. Flaking brick is efflorescence or spalling, both signs that water has penetrated the masonry. If the flue liner is deteriorated, the same water intrusion can also be letting exhaust gases seep back into the house instead of venting out the top. We’d inspect the flue, the crown, and the flashing. If the liner is shot, we’d recommend a HeatShield resurfacing or a stainless liner replacement, then address the exterior masonry so the problem doesn’t come back. Call (903) 515-5079 and we’ll walk you through what we find.
Yes, but for different reasons. Gas appliances don’t create creosote the way wood fires do, but they do produce condensation, and their valves, thermocouples, and sensors can fail quietly during months of disuse. An annual inspection on a lightly used gas fireplace catches corrosion, spider webs inside the burner, debris on the cap, and any venting blockages before the one cold week you actually need it. It also preserves the value of your Alamo Heights home. Many buyers in this neighborhood specifically ask when the gas fireplace was last inspected before closing.
Call Alcott Chimney San Antonio for Gas Fireplace Repair in Alamo Heights
If your gas fireplace is acting up, don’t wait for the next cold snap to find out why. We serve Alamo Heights with the same uncomplicated approach we’ve used since 2002: a real person answers the phone at (903) 515-5079, a named and photo-verified technician arrives on time, and you get a written price before any repair begins. If it isn’t right, we come back free under our 365-Day Done Right Promise. That’s the whole deal.
Written by Ruben Castellano, Owner at Alcott Chimney San Antonio, serving Alamo Heights homeowners since 2002.