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.
DuraFlex Gas Fireplace Repair in San Antonio: What to Know First
We’re an independent DuraFlex service provider in San Antonio, and yes, we repair DuraFlex gas fireplace systems. Most DuraFlex gas fireplace repairs in San Antonio run between $180 and $650 depending on what’s actually wrong, and we’ll give you a written price before any work starts. If your fireplace is acting up, you’ll know exactly what you’re paying for before we touch it.
This page is for San Antonio homeowners with a DuraFlex gas fireplace or gas insert who want straight answers about what goes wrong, what it costs, and whether it’s worth fixing. Call (254) 276-4116 and a live person answers. Day or night. We’ll talk through what you’re seeing and get you on the schedule.
How DuraFlex Products Fail – and How We Fix Them
DuraFlex makes solid venting products, but every brand has its weak points. Here’s what we actually see on service calls across San Antonio.
- DuraFlex Direct Vent Pro: gasket and seam leaks. The Direct Vent Pro series is common in newer San Antonio builds, and the most frequent call we get is a smell of gas or exhaust near the unit. It’s usually a degraded gasket at a pipe seam or a joint that shifted during our foundation-settling summers. We pull the affected section, replace the gasket with an OEM-spec part, and pressure-test the run before we call it done.
- DuraFlex GS (Gas Stove) liners: kinked flex at the appliance collar. On gas stove installations, the flexible liner often gets a sharp bend right where it meets the stove’s flue collar. That kink restricts draft and can trip the spill switch, which shuts the stove down mid-burn. We re-route the liner with a smoother radius and re-secure it so it doesn’t creep back.
- DuraFlex SW (Single Wall) rigid pipe: corrosion at horizontal runs. San Antonio’s humidity plus the acidic condensate gas appliances produce eats at single-wall rigid pipe, especially on short horizontal sections. We see pinholes and rust blooms there long before vertical sections show wear. The fix is section replacement, and we’ll show you a photo of the corrosion before we quote it.
- DuraFlex Aluminum Flex (Type B gas liner): crushed or flattened sections. We find this a lot in older San Antonio homes where someone ran a gas liner through a tight chase and forced it. A crushed section reduces cross-sectional area, which starves the appliance for combustion air. The flame burns lazy and yellow, and the unit soots up. We replace the damaged run and, where the chase allows, upsize to the next diameter for better draft.
- DuraFlex Pellet Vent Pro: ash impingement and gasket failure at clean-out tees. Even though it’s a pellet vent line, plenty of San Antonio homes run gas inserts through it. Ash from previous pellet use cakes at the clean-out tee and the gasket hardens from heat cycling. The symptom is a faint exhaust odor in the room. We clean the tee, replace the gasket, and run a draft test.
Styles & brands we work with
Our DuraFlex Gas Fireplace Repair Process
Here’s what happens when you book a DuraFlex gas fireplace repair with us, step by step.
- 1
Call. You call (254) 276-4116. A live person answers, asks what you’re seeing, and books a window with live arrival tracking. No four-hour guesses.
- 2
Diagnostic. Our tech arrives, runs the unit, checks gas pressure, inspects the venting run, and photographs everything suspect. You see the photos too.
- 3
Written price. Before any repair work begins, you get a line-item written price. If the unit is safe to leave as-is and the repair can wait, we’ll tell you that plainly.
- 4
The repair. We use OEM DuraFlex components or quality aftermarket parts from brands we trust, depending on what’s actually needed and available. We’ll explain the difference and let you decide.
- 5
Test and verify. After the fix, we run the fireplace through a full burn cycle, check for leaks with a gas sniffer, and confirm draft with a smoke test.
- 6
Photos and guarantee. You get before-and-after photos, a digital invoice you can pay from your phone, and a written guarantee on every repair. If the repair fails within 365 days, the second visit is free.
What DuraFlex Gas Fireplace Repair Costs in San Antonio
Here are the ranges we typically see in San Antonio. Your exact price depends on your unit, your venting configuration, and what we find during diagnostics.
- Diagnostic service call: $89 – $149
- Gasket replacement (door, seam, or tee): $120 – $260
- Flex liner section replacement: $300 – $600
- Rigid vent pipe section replacement: $250 – $550
- Gas valve or thermopile replacement: $180 – $450
- Full diagnostic plus multiple repairs: $400 – $900
What moves the price most is accessibility. If your fireplace is on an interior wall with a long venting run through a finished chase, labor goes up. If it’s a simple direct-vent unit on an exterior wall, it’s usually on the lower end. You’ll know your number before we start. Call (254) 276-4116 for a free estimate.
See the difference
Before
After
Before
After
Before
AfterWhy San Antonio Homeowners Call Hadley Chimney San Antonio for DuraFlex Work
We’ve been at this since 2003, and Cory Mitchell built this company on a simple idea: see the problem, understand the fix, then decide – that’s how it should work. That’s why every DuraFlex job we do in San Antonio comes with photo documentation, a written price upfront, and a written guarantee on the repair. If it fails within 365 days, we come back free.
We don’t just know DuraFlex. Our techs work with HeatShield and Gelco repair systems too, which matters because sometimes a DuraFlex venting issue turns out to be a firebox or smoke chamber problem that needs a different fix. You get the right repair, not the one we happen to sell. And every job runs under The Relay Visibility Guarantee: live arrival tracking, before-and-after photos, and digital invoicing. It’s the same standard across the Relay Home Co. family.
FAQs
No. As an independent DuraFlex service provider, we use OEM or OEM-spec parts and follow DuraFlex’s installation guidelines, which keeps your warranty intact. What voids warranties faster than anything is using non-listed parts or modifying the venting run, and we don’t do either. We’ll document every part we use so you have a record.
Most common DuraFlex components, including Direct Vent Pro gaskets, flex liner sections, and SW rigid pipe, are available through our local supply network in San Antonio within one to three business days. Oddball sizes or discontinued series can take longer, and we’ll tell you that upfront rather than stringing you along. Call (254) 276-4116 and we’ll check availability while you’re still on the phone.
If the firebox, burner, and control system are all still functional and the problem is venting-related, repair almost always makes more sense. Venting components like gaskets and liner sections are wear items meant to be replaced. If the burner itself is rusted through or the control module is failing, replacement starts to look more reasonable, and we’ll tell you honestly which side your unit falls on.
No. An odd smell from a gas fireplace usually means incomplete combustion or an exhaust leak, and both are reasons to stop using the unit until it’s inspected. Carbon monoxide is odorless, but the byproducts that accompany it often aren’t. Shut the unit off, turn off the gas at the isolation valve if you can, and call us. This is the one repair on this page we’ll tell you not to wait on.
Yes. We work on gas fireplace venting and repair across multiple brands, including HeatShield ceramic repair systems and Gelco products, because many San Antonio homes have mixed-brand installations. The brand matters less than whether the repair is done right, with the right parts, and backed by a written guarantee.
Ready to Get Your DuraFlex Fireplace Fixed?
Call (254) 276-4116 now. A live person answers, 24/7. We’ll talk through what your DuraFlex gas fireplace is doing, give you a straight answer on whether it’s urgent, and get you on the schedule with a written price before any work starts. That’s the Hadley way, and it’s been working in San Antonio since 2003.
Written by Cory Mitchell, Owner, Hadley Chimney San Antonio at Hadley Chimney San Antonio, serving San Antonio and nearby areas.