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 Simi Valley
Gas fireplace repair in Simi Valley typically runs $145 to $385 for common fixes like pilot assembly replacement or thermocouple work, while flue liner repairs start around $900 depending on the damage. Most repairs on this side of the valley take a single visit, usually two to four hours on site. If your gas fireplace won’t light, won’t stay lit, or you smell gas when it runs, call us at (559) 282-2695 and we’ll send a technician you’ll know by name and photo before the truck turns onto your street.
We work throughout Simi Valley every week, from the 1960s ranch tracts near Royal Avenue up through the newer hillside builds off Madera Road and the gated communities north of the 118. Older east-side homes have their own set of gas fireplace problems that newer subdivisions simply don’t see, and we’ve spent enough time inside both to know the difference. That local familiarity means faster diagnosis, less guesswork, and a written price before we touch anything.
Why Alcott Chimney Ventura Is Simi Valley’s Preferred Gas Fireplace Repair Company
Ruben Castellano has run Alcott Chimney Ventura since 2002, and the company operates on a simple rule: every homeowner knows exactly who is walking through the door and exactly what the repair will cost before it starts. Our technicians are background-checked and identity-verified through the Threshold Standard, and you receive their name and photo before the appointment. When they arrive, they show a photo ID badge at the door. That’s not an upgrade. It’s how we work.
Homeowners across Simi Valley call us because we write the price down before any work begins, and every repair carries a written guarantee. If a repair fails during the coverage period, the second visit is free. The 365-Day Done Right Promise means a full year of accountability on every completed job. For families with young kids at home during the day or older homeowners who want certainty before opening the door, that matters more than a lowball bid that changes by the time the job is done.
We carry professional trade materials, not box-store substitutes. That includes DuraFlex liner systems, HeatShield resurfacing products, Gelco, Olympia Chimney, Famco, and Copperfield. When we replace a flue liner or install a chimney cap on a Simi Valley home, we use the same brands chimney professionals specify on new construction and commercial flue work.
Styles & brands we work with
Our Gas Fireplace Repair Services in Simi Valley
Our Gas Fireplace Repair team handles the full range of problems we see across the valley, from pilot lights that won’t hold a flame to full flue liner replacement on original 1960s and 70s ranch homes. Four services cover most of what Simi Valley homeowners call us for.
DuraFlex Flue Liner Installation
Original clay flue tiles on Simi Valley’s older east-side homes crack under repeated thermal cycling, especially during the temperature swings we get between cool nights and warm days. When those cracks run vertically through the tile, carbon monoxide from a gas fireplace can seep into wall cavities and living spaces. We remove or bypass the damaged sections and install a DuraFlex stainless liner sized to your existing flue, restoring a continuous exhaust path without tearing out the chimney chase. This is the single most common major repair we perform in the Royal Avenue and Sycamore Drive corridors.
HeatShield Flue Repair
When clay tile damage is less extensive, HeatShield’s cerfractory resurfacing compound can restore the flue without a full liner replacement. The material is applied through a spinning applicator and bonds to the existing tile, filling hairline cracks and minor spalling. For Simi Valley homes where the original flue is structurally sound but showing early signs of thermal stress, HeatShield buys years of safe operation at roughly two-thirds the cost of a full liner install. We’ll show you the camera footage before we recommend it, so you can see exactly what we’re seeing.
Chimney Cap Replacement
Santa Ana winds are the single biggest chimney cap killer in Simi Valley. High gusts tear cheap caps loose, and missing caps let debris, rain, and embers drop straight onto gas log sets. A damaged or absent cap also changes the draft characteristics of the flue, which is why so many gas fireplace pilots blow out during wind events. We install Famco and Copperfield caps with proper spark arrestors and secure mounting, sized to your flue’s actual dimensions, not a one-size-fits-all universal cap that rattles loose by next fire season.
Gas Fireplace Diagnosis and Component Replacement
Pilot assemblies, thermocouples, thermopiles, gas valves, burner tubes. These parts fail predictably on gas fireplaces that run a few nights each week through Simi Valley’s cool winter months. We stock common replacement components on our service trucks, and most ignition failures are fixed the same visit. If your fireplace lights but the flame is weak, yellow, or sooty, we’ll check the burner, the air shutter, and the venting before replacing anything, so you’re not paying for parts you don’t need.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Simi Valley
We install and service gas fireplaces and venting from the brands chimney professionals actually specify. Simi Valley homes we work on commonly have components from DuraFlex, HeatShield, Gelco, Famco, and Copperfield. Carrying these materials locally means we aren’t ordering generic parts from a big-box store and hoping they fit. For east-side homeowners with original flue components from the 1960s and 70s, matching the right brand to the existing setup means the repair lasts and the warranty holds. Most brand-specific parts are on our trucks during service calls on this side of the valley.
Common Gas Fireplace Repair Problems We See in Simi Valley Homes
- Cracked clay flue liners on original ranch homes. Many 1960s and 70s tract houses on the east side still have their original clay flue tiles. Repeated heating and cooling cycles crack them vertically, and those cracks are where carbon monoxide escapes. We find this on roughly a third of the older gas fireplaces we inspect near Royal Avenue and Los Angeles Avenue.
- Wind-driven backdrafting during Santa Ana events. When gusts push down the flue, exhaust that should vent upward gets forced back into the firebox. Homeowners notice soot stains above the fireplace opening, a pilot that won’t stay lit, or a gas smell in the room when the wind kicks up. The fix is usually a proper cap and damper adjustment, sometimes a taller flue termination.
- Missing or damaged chimney caps. Embers, leaves, and fine debris settle onto gas log sets when caps are missing. Burner ports clog, flame patterns get uneven, and logs start to discolor. Cap replacement is one of the cheapest repairs we do, and one of the most overlooked.
- Frequent pilot outages from thermocouple failure. If your pilot lights but goes out the second you release the knob, the thermocouple has lost its signal. It’s a small part, a quick fix, and one we replace routinely across Simi Valley, especially on gas fireplaces that only get used between November and February and sit dormant the rest of the year.
See the difference
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After
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AfterPricing for Gas Fireplace Repair in Simi Valley, CA
A standard gas fireplace diagnosis and component repair in Simi Valley runs $145 to $385. That covers the service call, a full diagnostic, and common part replacements like thermocouples, pilot assemblies, or gas valve adjustments. Chimney cap replacement typically runs $185 to $420 depending on cap size and flue configuration. HeatShield flue resurfacing starts around $1,200 for a standard single-flue chimney, and full DuraFlex liner installation runs $1,800 to $3,400 depending on flue height, access difficulty, and liner diameter. Every estimate is written down before work starts, and you’ll get a free estimate call at (559) 282-2695. No surprises at the end of the job. That’s the whole point.
We Also Serve Cities Near Simi Valley
Our crews work throughout eastern Ventura County. If you’re just over the line in Moorpark, Newbury Park, Fillmore, or Somis, we cover those areas as well, with the same written pricing and the same name-and-photo technician confirmation before every visit. Scheduling is coordinated from our Los Angeles office, but our technicians serve Simi Valley and the surrounding communities locally throughout the week.
Serving Simi Valley, CA - Our Local Coverage Area
We’re based in the Simi Valley 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 Simi Valley
Once a year. Even with light use, Simi Valley’s dry air and Santa Ana dust loads settle on burner assemblies and pilot tubes, and an annual check catches small problems before they become no-heat failures. If you use the fireplace more than three nights a week between November and February, consider a sweep and inspection twice a year. Schedule your annual inspection before fire season starts, and call (559) 282-2695 to book a time.
Vertical cracks in the original clay flue tiles. Those tiles have been expanding and contracting for fifty-plus years, and Simi Valley’s temperature swings between cool mornings and warm afternoons accelerate the failure. The cracks aren’t visible from the firebox, which is why we camera-inspect the full flue length before giving any repair recommendation. If we find cracking, we’ll show you the footage and walk through your options, including HeatShield resurfacing or a DuraFlex liner.
Wind is pressurizing the flue from above, which backdrafts exhaust into the firebox and blows out the pilot. It’s usually a combination of a missing or undersized chimney cap and a damper that isn’t sealing properly. The correct fix is a properly sized cap with a spark arrestor, often paired with damper adjustment or replacement. Call (559) 282-2695 and we’ll inspect both during the same visit.
Yes. Soot staining above the fireplace opening is the classic sign of wind-driven backdrafting, where exhaust is being pushed back into the room instead of up the flue. The repair involves addressing the draft problem, usually a new or repositioned cap and damper adjustment, and then cleaning the affected interior surfaces. Left alone, the backdraft condition that causes the stains also pulls carbon monoxide back into the living space, so it’s worth fixing before the next Santa Ana season.
No. The pilot lighting means the gas valve and ignition system work, but a cracked flue liner is an exhaust path failure. Gas fireplaces produce carbon monoxide even when burning cleanly, and a cracked liner lets that gas seep into wall cavities and rooms instead of venting outside. You can’t see or smell carbon monoxide, which is why any cracked liner we find is flagged as a stop-use condition until it’s repaired. We’ll never tell you it’s safe when it isn’t.
Gas Fireplace Repair You Can Verify, Not Just Take On Faith
One of the calls we remember best came from a 1970s ranch on the east side near Royal Avenue. The gas fireplace was drafting poorly and the chimney cap was missing. Santa Ana winds had been backdrafting exhaust into the firebox, and the original clay flue liner showed vertical cracks from repeated thermal cycling. We replaced the damaged sections with a HeatShield flue liner, installed a new Famco cap, and adjusted the damper so the gas logs now vent cleanly even during high-wind days. That’s the kind of repair we do across Simi Valley all winter long, and it’s why we won’t quote you a liner or cap without showing you the camera evidence first.
If your gas fireplace is acting up, call us at (559) 282-2695. A live person answers around the clock, you’ll get a written price before any work begins, and you’ll know the technician’s name and see their photo before they arrive.
Written by Ruben Castellano, Owner at Alcott Chimney Ventura, serving Simi Valley since 2002.