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.
Fast, Reliable Gas Fireplace Repair Across Pomona
Gas fireplace repair in Pomona typically runs $185 to $475 for most service calls, with flue liner installation starting around $1,900. Most repairs are completed in a single visit, though liner work on pre-WWII chimneys can take a second day. If your gas logs won’t ignite, your pilot light keeps dropping, or you smell something odd when the fireplace runs, call (336) 863-3889 and we’ll send a technician who knows Pomona’s older housing stock specifically.
We work in Pomona every week, and we’re familiar with what its homes throw at us. The Craftsman bungalows west of Garey Avenue, the 1950s tracts near Westmont, the Victorians around Lincoln Park. Each era of Pomona construction has its own chimney problems, and gas fireplaces vented into stacks never designed for them create problems most general handymen never catch. That’s why we camera-inspect before we repair, every time.
Why Alcott Chimney Sweep Is Pomona’s Preferred Gas Fireplace Repair Company
Ruben Castellano runs our crew, and he’s built Alcott Chimney Sweep on a simple rule: show the homeowner what we see before we ask them to spend a dollar. Every gas fireplace repair in Pomona starts with a camera inspection you can watch live on our monitor. If we recommend a repair, you’ll see exactly why. If we don’t, you’ll see that too, and we’ll tell you plainly when something can wait.
Our technicians are background-checked and identity-verified under the Threshold Standard. Before we arrive, you get the technician’s name and photo. When they knock, they show a photo ID badge. Every Pomona appointment includes a written price before work starts and a written guarantee on every repair. If a repair fails within the coverage period, the second visit is free. That’s our 365-Day Done Right Promise, and it applies to every gas fireplace job we complete in Pomona.
We carry professional trade materials, not box-store substitutes. DuraFlex liner systems, Olympia Chimney parts, Copperfield components. For Pomona’s older chimneys, the difference between a liner sized correctly and one guessed at is the difference between a safe fireplace and a slow carbon monoxide leak. We size to the appliance, not to whatever is on the truck.
Our Gas Fireplace Repair Services in Pomona
Gas Fireplace Flue Liner Installation and Sizing
Pomona’s pre-WWII housing stock is full of chimneys that were never built to handle a gas appliance. In Lincoln Park and the streets around it, we routinely find original 1910s – 1920s chimneys with no flue liner at all, just open brick. Venting a gas insert into that kind of stack is a carbon monoxide risk, plain and simple. We install DuraFlex liners sized to the specific BTU output of your fireplace, not a one-size-fits-most guess. A correctly sized liner in Pomona typically runs $1,900 to $3,400 depending on flue height and access.

Level 2 Camera Inspection Before Any Gas Fireplace Repair
In Pomona, we don’t repair a gas fireplace without first putting a camera up the flue. This is non-negotiable for us, and it’s especially important on the west side where unlined 1910s brick chimneys are common. A Level 2 camera inspection shows us spalling mortar, cracked clay tiles, water intrusion at the crown, and whether the flue is actually sized for a gas appliance. You watch the feed on our monitor. We quote only what the camera shows. Inspection costs in Pomona run $150 to $250, and the price is rolled into the repair quote if we find work that needs doing.

Chimney Crown Repair and Water-Sealing for Gas-Vented Stacks
Pomona’s inland climate is hard on chimney crowns. Summer days over 100°F followed by winter nights in the 30s mean repeated thermal expansion and contraction. Crowns crack. Water gets in, rusts out damper assemblies and gas log burners, and accelerates mortar deterioration. We rebuild crowns, seal them, and stop the cycle. Crown repair in Pomona ranges from $350 for minor crack sealing to $900 for a full rebuild. This is the repair that makes the others last.

Gas Fireplace Burner, Pilot, and Valve Service
When a gas fireplace in a Pomona home won’t light, the usual culprits are a dirty thermocouple, a clogged burner orifice, or a failing gas valve. These are repairable in one visit in most cases, and we stock common Olympia Chimney and Copperfield parts on the truck. Service calls for burner and pilot issues in Pomona typically run $185 to $375 including parts and labor. We’ll give you the written price before we turn a wrench.

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.
Common Gas Fireplace Repair Problems We See in Pomona Homes
- Unlined 1910s – 1920s brick flues in Lincoln Park bungalows. Exhaust gases seep through deteriorating mortar into balloon-framed walls. This is the single most common fire hazard we find in Pomona’s historic district, and it’s invisible without a camera inspection.
- Thermal cracking in clay flue tiles and chimney crowns. Pomona’s 100°F summers and 30s°F winter nights flex older masonry every single year. The cracks let water in, which then rusts out gas log burners and damper components from the inside.
- Third-degree creosote glaze left over from prior wood burning. A brush cannot remove this material. When a gas insert is installed into a flue with glaze still present, the glaze traps heat. This gets misdiagnosed as a simple sweeping job more often than we’d like to admit, and it’s dangerous to leave unaddressed.
- Gas fireplaces vented into chimneys with cracked crowns. Water enters through the crown, drips down the flue, and corrodes the appliance’s burner and valve. The homeowner sees a fireplace that won’t stay lit and assumes it needs a new gas valve; what it actually needs is a crown repair and a proper liner.
Trusted Brands We Service in Pomona
We install and service DuraFlex liner systems, Olympia Chimney components, Copperfield parts, and Famco venting. These are the brands chimney professionals specify for code-compliant gas fireplace installations, not big-box substitutes. Because we work Pomona weekly, we keep common parts for these systems on the truck, which means fewer second trips for you and a repair that’s done the same day more often than not. If your gas fireplace uses a brand we haven’t mentioned, call us anyway. A camera inspection tells us what we’re dealing with, and we’ll source the correct part rather than adapt something that doesn’t fit.
Pricing for Gas Fireplace Repair in Pomona, CA
A standard gas fireplace service call in Pomona runs $185 to $375. That covers diagnostic work, burner and pilot cleaning, thermocouple replacement, and most valve adjustments. Camera inspections run $150 to $250 as a standalone service, and that fee is applied toward any repair we quote from what the camera shows. Flue liner installation $1,900 to $3,400 depending on flue height, access, and whether we’re relining a single-story bungalow or a two-story Queen Anne. Chimney crown repair runs $350 to $900. Every quote is written before work starts, and every repair carries our written 365-Day Done Right Promise. If it fails within the coverage period, the second visit is free. Call (336) 863-3889 for an exact Pomona quote. Estimates are free.
What Makes Pomona’s Gas Fireplace Repairs Different
Pomona has one of the densest concentrations of 1910s – 1920s Craftsman bungalows in Los Angeles County, and the Lincoln Park Historic District is exhibit A. In these homes, the original chimneys were often built with no flue liner at all. Just open brick. It met code when the house went up, but it doesn’t come close today. We were called to a 1918 Craftsman on West Alvarado Street where the homeowner’s gas insert had been venting into the original unlined brick flue for years. Our camera showed spalling mortar and a cracked crown admitting water into the stack. The homeowner watched the same feed we did. We rebuilt the crown, installed a HeatShield liner sized for the appliance, and re-sealed the firebox and damper assembly. That’s the Pomona job in a nutshell. Older chimney, gas appliance added decades later, and a stack that was never meant to carry either one.
The 1950s and 1960s tract homes from Westmont to Phillips Ranch have their own signature problem: single-wythe brick chimneys with cracked mortar crowns. The thermal swing between Pomona’s triple-digit summer days and its near-freezing winter nights works on those mortar joints year after year. Crowns crack. Water seeps in. The gas log burner rusts out. If you’re in a mid-century Pomona tract home and your gas fireplace won’t stay lit, the burner may be the symptom, but the crown is often the disease.
We Also Serve Cities Near Pomona
Our crews serve Pomona and the surrounding communities, including Diamond Bar, Montclair, Chino Hills, and Claremont. If you’re in one of those towns, our Gas Fireplace Repair services cover you the same way. For Pomona homeowners specifically, we schedule by neighborhood and coordinate dispatch from our Los Angeles office so a local crew reaches you without the runaround. Learn more about our work in Pomona and what we find in its older chimneys.
Serving Pomona, CA - Our Local Coverage Area
We’re based in the Pomona 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 Pomona
Because many Lincoln Park bungalows have original unlined brick flues, which means exhaust gases can seep through deteriorating mortar into balloon-framed walls. A camera inspection shows us whether your fireplace is venting safely or venting into places it shouldn’t. We won’t repair a gas fireplace in Pomona without one. Call (336) 863-3889 to schedule an inspection; the camera fee rolls into any repair quote.
The Pacific inland climate, specifically Pomona’s wide temperature swings, causes repeated thermal expansion and contraction that cracks clay flue tiles and mortar joints. Those cracks let water in and exhaust gases out, and they’re the root cause of most gas fireplace venting failures we repair in Pomona’s older homes. The fix is usually a new liner and crown repair, not a new fireplace. Call us for a camera inspection and we’ll show you exactly what’s happening.
Usually, yes. Mid-century Pomona tract homes typically have single-wythe brick chimneys with cracked mortar crowns, while historic bungalows have unlined brick flues. The crown cracks are a water-intrusion problem that rusts out burners; the unlined flues are an exhaust-leak problem that requires a liner. The repair path is different depending on your home’s era. We’ll identify which one you have. Call (336) 863-3889 and we’ll put a camera on it.
Once a year, regardless of how often you use the fireplace. Even gas fireplaces produce acidic condensation that eats at mortar over time, and Pomona’s temperature swings accelerate that deterioration. An annual inspection catches crown cracks before they rust out your burner, and it’s far cheaper than a full rebuild. Our inspections run $150 to $250, and we show you the camera feed so you know exactly what’s going on.
Third-degree creosote is a hard, glaze-like tar deposit left in the flue from prior wood burning, and a brush cannot remove it. If you’re converting a wood-burning fireplace to gas, that glaze traps heat around the insert and creates a fire risk. It has to be removed or the flue relined before the gas appliance goes in. We encounter it constantly in Pomona because so many bungalows burned wood for decades before gas conversions. Call (336) 863-3889 and we’ll confirm whether your flue has it during the pre-installation camera inspection.
Written by Ruben Castellano, Owner at Alcott Chimney Sweep, serving Pomona since 2002.





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