Level 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.
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AfterFast, Reliable Gas Fireplace Repair Across Fort Collins
Gas fireplace repair in Fort Collins typically runs $180 – $340 for most service calls, and if your insert is drafting poorly on a windy day or the pilot won’t stay lit, we can usually diagnose it in a single visit. We work throughout Fort Collins, from Old Town’s brick Victorians to the newer subdivisions east of I-25, and we know how Chinook winds and 5,000-foot elevation change the way gas appliances burn here. Call (336) 863-3889 for a written quote before any work begins. You’ll know the technician’s name and see their photo before we arrive.
Alcott Chimney Sweep has been serving homeowners since 2002. We’re part of the Threshold Group family, and every technician who steps onto your Fort Collins property has passed a background check and identity verification. That’s the Threshold Standard, not an optional add-on. When your gas fireplace acts up in a 1920s Old Town bungalow or a 1980s home near CSU, you want someone who understands the chimney behind the appliance, not just the gas valve in front of it.
Why Alcott Chimney Sweep Is Fort Collins’s Preferred Gas Fireplace Repair Company
Fort Collins presents a unique set of chimney and venting problems that generic fireplace repair companies don’t see coming. Our Gas Fireplace Repair team works on the entire system, not just the burner. That matters here because so many Fort Collins homes vent gas appliances into chimneys that were never designed for them.
In the Old Town district, late-Victorian and early 20th-century brick homes often still carry their original clay-tile flue liners. Decades of freeze-thaw cycling, compounded by 40°F Chinook temperature swings, crack and spall those tiles. A gas insert vented into a cracked, unlined flue is not a warm fireplace; it’s a carbon monoxide pathway waiting for a downdraft. We find this pattern repeatedly in Fort Collins, particularly in homes converted from coal to gas decades ago.
You’ll know the technician’s name and see their photo before we arrive. When Ruben Castellano sends a technician to your door in Fort Collins, that person is uniformed, background-checked, and identity-verified. They’ll show you a photo ID badge. Every time. No exceptions. If you’re home alone, or if you have young children, or if you simply want to know exactly who is coming before the truck pulls up, that matters.
We quote a written price before any work starts. Not an estimate range. Not a “we’ll see once we open it up.” A written price. If the repair fails within the 365-Day Done Right Promise period, the second visit is free. We put that in writing, every job.
Our Gas Fireplace Repair Services in Fort Collins
Gas Fireplace Insert Removal and Flue Camera Inspection (Level 2)
We don’t guess at what’s happening inside your chimney. We remove the insert and run a camera down the flue, and we show you the footage on a monitor in real time. In Fort Collins, this step catches problems that would otherwise stay hidden for years. Old Town chimneys converted from coal to gas in the 1950s – 70s frequently have abandoned upper flue sections that were never relined or capped. Our cameras routinely find intact creosote deposits sitting in those dead sections directly above a live gas appliance. You see the evidence. We don’t recommend a single repair without it.
HeatShield and DuraFlex Stainless Flue Relining
When a Fort Collins chimney has cracked clay tiles, spalling mortar, or an unlined flue, the right fix is often a stainless liner sized for the gas appliance. We install HeatShield resurfacing and DuraFlex liner systems, the same materials chimney professionals specify. A properly sized liner restores draft, prevents combustion gases from leaking through mortar joints into wall cavities, and ends the downdraft problems that plague short or uncapped chimneys on windy Front Range days. If your Old Town chimney still has its original 1920s clay tile flue, relining is likely part of the conversation.
Chimney Cap and Crown Repair
Fort Collins gets hit with sustained Chinook gusts above 60 mph. A missing or undersized cap on an unlined flue turns a windy afternoon into a living-room smoke event. We repair and replace chimney caps and crowns, and we size them to the appliance and the flue. A correctly sized cap stops downdrafts, keeps rain and snow out of the flue, and blocks birds and debris. For gas inserts vented into old clay-tile flues, the cap also prevents wind from pushing fumes out of abandoned upper sections back down into the house.
Pilot, Thermocouple, Thermopile and Burner Service
At 5,000 feet, gas appliances tuned for sea level burn dirtier and deposit creosote faster. Pilots that flicker or won’t stay lit are often a symptom of a larger drafting problem, not just a dirty thermocouple. We service the gas train, the burner assembly, and the venting path together. If your gas fireplace in the CSU rental stock near Drake Road or Shields Street has been neglected through tenant turnover, a full system check usually surfaces more than just a pilot issue. We’ll show you what we find, and we’ll give you a written quote before any repair work starts.
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 Fort Collins
We carry and install professional trade materials, not box-store substitutes. Our Fort Collins work regularly includes HeatShield resurfacing for flues with modest cracking, Gelco chimney caps and chase covers for wind-driven rain, and Olympia Chimney and Famco components for liner terminations and venting. Because we stock these locally and work with the same suppliers chimney professionals across the Front Range use, we typically turn around repairs faster than companies that have to order parts from out of state. If your gas insert was installed with unknown or off-brand venting components, we can usually identify the problem and recommend the right trade-grade replacement.
Common Gas Fireplace Repair Problems We See in Fort Collins Homes
- Abandoned coal-era flue sections full of creosote above a live gas insert. This is the Fort Collins problem no generic repair page mentions. 1950s – 70s coal-to-gas conversions often left the upper flue unlined, uncapped, and coated in old coal creosote. Our camera shows you the exact deposit, sitting right above your fireplace.
- Chinook downdrafts pushing fumes back into the living room. Sustained 60+ mph gusts reverse draft in short or uncapped flues. The smell isn’t just annoying; it means combustion gases are entering your living space. A properly sized cap and liner stop this.
- Clay tile spalling from freeze-thaw and rapid temperature swings. Old Town’s century-old clay tile liners crack and flake. Those loose tiles can block draft and allow gas byproducts to leak through the mortar joints. We see new damage every spring cleaning season.
- Altitude-related dirty burning and early creosote buildup. Sea-level-tuned gas appliances burn less efficiently at 5,000 feet. First-degree creosote forms faster, even with gas. Ignoring it leads to the kind of hidden deposits that surprise homeowners who assumed a gas conversion meant no further chimney maintenance.
Pricing for Gas Fireplace Repair in Fort Collins, CO
A standard gas fireplace service call in Fort Collins runs $180 – $340, covering the diagnostic, pilot and thermocouple testing, and a visual inspection of the venting. A full insert removal, Level 2 flue camera inspection, and written report typically runs $275 – $425. HeatShield resurfacing of a cracked clay tile flue starts around $1,600 – $2,400 depending on flue length, while a full stainless DuraFlex reline for a gas insert is usually $2,200 – $3,800. Chimney cap replacement in Fort Collins typically runs $350 – $700 installed, depending on cap size and flue termination. Every quote is written, delivered before work begins, and covered by the 365-Day Done Right Promise. Call (336) 863-3889 for exact pricing on your system. Estimates are free.
We Also Serve Cities Near Fort Collins
While this page covers Gas Fireplace Repair in Fort Collins, we regularly serve homeowners in Greeley, Boulder, Denver, and Colorado Springs. Dispatch and scheduling for the Front Range are coordinated from our Denver office, and our local crews know the difference between a Greeley ranch house and an Old Town Victorian. If you’re in a neighboring community, call (336) 863-3889 and we’ll get you scheduled.
Serving Fort Collins, CO - Our Local Coverage Area
We’re based in the Fort Collins 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 Fort Collins
Yes. Gas fireplaces produce moisture and acidic combustion byproducts that corrode flue liners and mortar joints over time, and at 5,000 feet the burn is dirtier. In Fort Collins, we routinely find creosote in abandoned upper flue sections above active gas inserts in Old Town homes, even when no wood has ever been burned in that chimney. An annual check catches these problems before a Chinook downdraft pushes fumes into your living room. Call (336) 863-3889 to schedule, and remember the written quote and camera evidence come standard.
Chinook downslope winds hit the Front Range hard, and a short or uncapped flue will reverse draft under that pressure. In Fort Collins, the wind pushes combustion gases from both the active insert and any abandoned coal-era sections back down into the living space. The fix is usually a properly sized cap and a lined flue. We’ll show you the camera footage of exactly where the draft is pulling from before we recommend anything.
Almost always, yes. Coal-to-gas conversions from the 1950s through the 1970s often left upper flue sections unlined, uncapped, and coated in old coal creosote. That creosote doesn’t go away because you stopped burning coal. Our cameras find thick bands of third-degree glaze sitting directly above active gas inserts throughout Old Town, including homes near the 200 block of West Mountain Avenue. The active section below may be spalling and unlined. A Level 2 camera inspection shows you exactly what remains. Call (336) 863-3889 for a written quote.
You don’t, until someone runs a camera. If a company tells you that you need a new liner without showing you video evidence of cracked tiles, spalling mortar, or an unlined flue, get a second opinion. Every Fort Collins relining recommendation we make is backed by camera footage you watch with us in real time. If the flue is intact and only needs sweeping, we’ll tell you that. No upsell, no scare tactics, just the monitor.
Yes. At roughly 5,000 feet, the air is less dense and gas appliances burn less efficiently unless they’re specifically tuned for altitude. That produces more first-degree creosote and soot, which deposits faster in the flue. Chinook temperature swings then accelerate thermal cycling on clay tiles and mortar joints. A gas fireplace that worked fine at sea level needs different maintenance here. We tune and test the entire system for Fort Collins conditions, not generic ones. For exact pricing on an inspection, call (336) 863-3889.
Written by Ruben Castellano, Owner at Alcott Chimney Sweep, serving Fort Collins since 2002.
Ready to get your gas fireplace inspected or repaired in Fort Collins? Call (336) 863-3889 for a free estimate. You’ll get a live person, a written quote before any work starts, and a technician whose name and photo you’ll know before we arrive.