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 Castle Hills
If your gas fireplace in Castle Hills won’t light, produces a lazy yellow flame, or fills the room with a sooty smell, you need a technician who understands how older Castle Hills chimneys fail. We work on gas fireplaces vented through chimneys built in the 1960s, 1970s, and 1980s, and we know those stacks weren’t designed for today’s gas appliances. A gas fireplace repair in Castle Hills typically runs $145 to $385 for common fixes like thermocouple replacement, pilot assembly repair, or burner cleaning. If the issue involves flue liner damage or chimney crown failure, expect $1,800 to $4,900 for relining or masonry work. Call (903) 515-5079 for a free estimate on any gas fireplace problem you’re seeing.
Ruben Castellano leads our team, and every technician who arrives in Castle Hills is background-checked, identity-verified, and announced to you by name and photo before we ever ring the bell. No surprises, no anonymous contractor at your door. That’s the way it should work everywhere, but we know Castle Hills homeowners specifically value that level of certainty.
Why Alcott Chimney San Antonio Is Castle Hills’s Preferred Gas Fireplace Repair Company
Castle Hills is a tight, established community with older custom homes and neighbors who talk. That means reputation travels fast. We’ve built ours on showing up when we say we will, sending the exact technician we promised, and never recommending work we can’t prove with a camera. Homeowners off West Avenue, Honeysuckle Lane, and along the stretch near Loop 410 know us for straight answers on gas fireplace repair, not pressure tactics.
Here’s what you get when you book with us in Castle Hills: a written price before any work begins, a written guarantee on every repair, and a free second visit if that repair fails within the coverage period. That’s our 365-Day Done Right Promise, and it isn’t marketing language. It’s the same standard we’ve held since 2002 as part of the Threshold Group family of home-service companies. If a gas fireplace repair we complete in Castle Hills doesn’t hold, we return and make it right at no charge.
We also answer our phones with a live person, every hour of the day. If your gas fireplace acts up at 11 p.m. and you smell something off, you’ll talk to a human who can tell you whether to shut off the gas at the valve and wait for a morning visit, or whether you need us there immediately. That matters in a city like Castle Hills, where homes are older and gas appliance issues shouldn’t wait on a voicemail.
Styles & brands we work with
Our Gas Fireplace Repair Services in Castle Hills
Most gas fireplace problems in Castle Hills fall into a few categories. Here’s what we actually do when we get to your home off Mockingbird Lane or Ridgehaven Drive.
Gas Log and Burner Repair
Gas logs in Castle Hills homes often show soot buildup on the ceramic logs and rust on the burner pan. That’s not normal, and it’s usually traced back to poor draft from a deteriorated chimney, not the gas valve. We clean or replace burners, adjust the air shutter, and verify the flame pattern so combustion is complete. If your flames are yellow and lazy, call (903) 515-5079 and we’ll diagnose the cause rather than just wiping down the logs and leaving.
Flue Relining with DuraFlex or HeatShield
This is the repair we do most often in Castle Hills, because so many homes here still have original clay flue liners. When those liners spall and crack, gas exhaust escapes into places it shouldn’t. We install DuraFlex stainless steel liners or apply HeatShield resurfacing to restore a continuous, safe venting path. The specific product depends on the condition of your existing flue, and we’ll show you the camera footage so you see exactly why the work is necessary before you spend a dollar.
Chimney Crown Repair and Cricket Flashing
A cracked chimney crown or missing cricket flashing let water into the chimney chase, and that water often gets misread as a gas valve failure. Castle Hills gets heavy downpours, and the humid subtropical climate with its freeze-thaw cycles in winter works on masonry joints year after year. We repair crowns, install cricket flashing behind chimneys on 1960s-80s custom homes, and stop the water before it ruins your gas fireplace or rots the framing around it.
Level 2 Camera Inspection for Gas Appliance Venting
If you’ve converted a wood-burning fireplace to gas logs, or if you’ve never had the flue inspected before, a Level 2 camera inspection is the single most valuable service we offer in Castle Hills. The camera sees what eyes can’t: spalled clay liners behind the firebox, hidden cracks in the flue, and mortar joints that have failed from decades of thermal expansion and contraction. We do not recommend gas fireplace repairs without this evidence, and we do not recommend liner work you can’t see for yourself on our screen.
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 Castle Hills
We install and service gas fireplaces and venting systems from manufacturers and material suppliers that chimney professionals actually specify. For Castle Hills homeowners, we stock parts for common DuraFlex liner kits, HeatShield resurfacing systems, and Olympia Chimney components, which means less waiting on shipping when your fireplace needs a repair. Whether we’re replacing a gas valve, relining a flue, or rebuilding a crown, the materials come from the same trade suppliers masons and chimney technicians have used for decades, not whatever generic part fits. We don’t substitute, and we don’t improvise with materials that aren’t rated for the application.
Common Gas Fireplace Repair Problems We See in Castle Hills Homes
- Wood-to-gas conversions without relining. Castle Hills homeowners often convert a wood-burning fireplace to gas logs and skip the flue. The original clay liner wasn’t built for warm, moist, acidic gas exhaust, and within a few seasons the liner spalls behind the firebox. Hidden cracks then allow exhaust into wall cavities. A camera inspection catches this before it becomes a carbon monoxide problem.
- Water stains near the fireplace after heavy rain. Castle Hills gets powerful thunderstorms, and older chimneys with cracked crowns or missing cricket flashing channel water straight down the chase. Homeowners see a stain on the ceiling near the fireplace and assume it’s a gas issue. It’s usually masonry, and we check both.
- Soot and rust on logs from poor draft. Deteriorated mortar joints in your chimney reduce draft, which means gas logs burn incompletely. That leaves soot on the ceramic and rust on the burner. A chimney sweep and minor repair can often restore proper ventilation without replacing the entire gas insert.
- Thermocouple and pilot failures on original gas valves. Older gas fireplaces throughout Castle Hills run on valves that are 20 to 30 years old. Thermocouples wear out, pilots won’t stay lit, and homeowners get frustrated lighting the fireplace every evening. We replace these components and test the entire system for proper pressure and venting before we leave.
See the difference
Before
After
Before
After
Before
AfterPricing for Gas Fireplace Repair in Castle Hills, TX
Gas fireplace repair in Castle Hills rarely comes in one flat number, because the problem could be a $145 thermocouple or a $4,200 flue relining. Here are honest ranges based on the work we do most often in this city:
- Diagnostic service call: $89, credited toward any repair
- Thermocouple or pilot assembly replacement: $145 to $285
- Gas log cleaning with burner adjustment: $175 to $340
- Gas valve replacement: $325 to $580
- Level 2 camera inspection: $250 to $450, depending on chimney height and access
- DuraFlex flue liner installation: $2,200 to $4,900, depending on flue length and roof pitch
- Chimney crown repair with cricket flashing: $950 to $2,800
Every quote is written down before we start, and you approve it before any work begins. There’s never a surprise charge at the end, and the repair carries a written guarantee. If it fails within the coverage period, the second visit is free. Call (903) 515-5079 for an exact quote on your gas fireplace.
We Also Serve Cities Near Castle Hills
When we’re not working in Castle Hills, our Gas Fireplace Repair team covers the surrounding communities, including San Antonio, Schertz, Cibolo, and Boerne. If you’re just outside Castle Hills and need gas fireplace service, call us and we’ll check our schedule for the week.
Serving Castle Hills, TX - Our Local Coverage Area
We’re based in the Castle Hills 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 Castle Hills
Because the original clay flue liners in those homes were fired for wood smoke, not the moist, acidic exhaust of a gas appliance, and after 40 to 60 years of Castle Hills’s hot summers and occasional winter freezes, those liners are already spalling. Converting to gas without relining accelerates the deterioration and can push exhaust into wall cavities. We recommend a Level 2 camera inspection before any wood-to-gas conversion in Castle Hills, and we don’t recommend relining unless the camera shows you the damage. Call (903) 515-5079 to schedule an inspection.
Yes. A cracked crown lets rainwater into the chimney chase, and water that reaches your gas valve, pilot assembly, or wiring can cause intermittent shutdowns. Castle Hills thunderstorms are intense, and a crown that was marginal ten years ago is often the reason your fireplace won’t stay lit now. We repair crowns and add cricket flashing where 1960s-80s Castle Hills homes commonly lack it, which keeps water out for good. A quick phone call to (903) 515-5079 gets an inspection on the calendar.
No. A yellow, lazy flame means incomplete combustion, and a sooty smell means your chimney isn’t drafting correctly. Castle Hills’s humid climate and aging masonry chimneys both contribute to poor draft, but the fix is specific: we clean the burner, adjust the air shutter, and inspect the flue for obstructions or deterioration. We don’t just clean the logs and call it done. If you’re seeing this in your Castle Hills home, call (903) 515-5079 for a diagnostic visit.
Yes, annually. Even a gas-only fireplace vents through a chimney that takes weather year-round in Castle Hills, and freeze-thaw cycles here break down mortar joints and crack flue liners regardless of whether you burn anything. The National Fire Protection Association recommends annual inspections for gas fireplaces too. A basic sweep and visual check catches problems before they get expensive. Schedule yours at (903) 515-5079.
By showing you the camera footage before we ever recommend a liner, crown repair, or gas valve replacement. In Castle Hills, where original clay liners in older homes are genuinely failing, some gas-only companies use that fact to sell relining jobs on every visit. We don’t. If the camera shows your flue is sound, we tell you your fireplace is fine and leave it alone. Ruben Castellano’s entire business is built on the principle that the customer should see the same evidence we see. If we recommend work, you’ll know exactly why. Call (903) 515-5079 and put us to the test.
Contact Alcott Chimney San Antonio for Gas Fireplace Repair in Castle Hills
When your gas fireplace in Castle Hills needs repair, you want a technician who knows this city’s older chimneys, who arrives announced and identifiable, and who gives you a written price before touching anything. That’s what we do, every time. Call (903) 515-5079 for a free estimate, or to schedule a Level 2 camera inspection if you suspect liner damage in your 1960s-80s Castle Hills home. A live person answers, 24/7.
Written by Ruben Castellano, Owner at Alcott Chimney San Antonio, serving Castle Hills and the surrounding communities.