Sweep & inspection
Caps & crowns
Flue relining
Masonry repair
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.
Gelco Chimney Cleaning in Commerce, CA | Walnut Chimney
We provide independent Gelco chimney cleaning, service, and repair across Commerce, CA. What makes our Gelco work different here is simple: we know that most Gelco inserts in Commerce sit unused for months at a time in fireplaces originally built for looks, not heat. That pattern creates a specific set of problems, from corroded pilots to rusted dampers, and we diagnose them honestly. Call us at (855) 341-3461 for a free estimate.

At Walnut Chimney, we’ve worked on Gelco fireplaces and inserts across Commerce’s tight post-war stucco lots long enough to know their specific quirks. For broader coverage, see our Gelco sales & service information and our Commerce service area page.
Why Commerce Residents Choose Us for Gelco Service
Gelco units in Commerce have a particular lifecycle. Most of these fireplaces were installed in the 1950s and 60s, then retrofitted with Gelco inserts in the 80s and 90s. They burn a few fires a year, sit through the long, smoggy inland-basin summers, and then get called into duty on a cold January night when the damp air settles in. That pattern, repeated for decades, is exactly what our technicians know how to address.
Russ Dempsey, our owner at Walnut Chimney, picked up his venting and sheet metal fundamentals through the HVAC program at Citrus College before spending years doing fireplace retrofits on older ranch homes across the San Gabriel Valley. He’s been working flues in the Walnut area for going on two decades. If the flue’s clean and the draft is right, everything else takes care of itself. That’s the standard we bring to every Gelco service call in Bell and Commerce.
We carry professional-grade parts and hardware from Gelco, DuraFlex, HeatShield, Olympia Chimney, Famco, and Copperfield. When a factory Gelco damper is discontinued, we don’t improvise with hardware-store parts. We use quality aftermarket dampers and flue components that actually fit, and we tell you which is which before we install anything.
Styles & brands we work with





Common Gelco Chimney Cleaning Problems We Solve in Commerce
- Standing-pilot gas inserts that won’t stay lit. In Commerce’s rarely-burned decorative fireplaces, the pilot assembly and thermocouple corrode or clog while the unit sits unused. You turn the knob for the first fire of winter and the flame sputters out. We clean the pilot orifice, test the thermocouple, and replace components only when they’ve actually failed.
- Bi-fold glass doors that seize, sag, or jam. Gelco wood-burning inserts with factory bi-fold glass doors are common here. After years of no use, the hinges and tracks bind. We rehang and service the door hardware so you’re not propping the doors open and letting smoke habits spill into the room.
- Dampers rusted shut or frozen open. Commerce’s wet winters followed by long dry spells do a number on original Gelco dampers. The top-sealing mechanism binds, and suddenly you can’t control the draft. We free and service these dampers during a cleaning or Level 2 inspection.
- Insert-to-masonry seal failure. Older Gelco retrofits in Commerce often sit in fireboxes that were never perfectly square. Over time the seals and flue collars degrade, leaking smoke and pulling cold, smoggy outside air into the room. We catch this during a Level 2 inspection and reseal it properly.
- Chase covers missing on converted structures. This one is more common in Commerce than almost anywhere else we work, because so many lots have unpermitted rear additions and converted garages. The Gelco insert is often vented through a chase that shares a roofline with that converted structure, and the chase cover gets lost or rusted out. We find uncovered flues, animal nests, and leaf litter before the homeowner has any idea something’s wrong.
Gelco Service in Commerce: What Local Conditions Mean for Your Equipment
Commerce’s dense grid of converted garages and unpermitted rear additions shapes Gelco repair in Bell Gardens and here more than any other factor. When a Gelco insert is installed in a chase that shares rooflines and flues with those converted structures, a routine sweep often turns into uncovering a missing chase cover or a cross-vented flue near the rear roofline. The flue sits open, rain pours in, leaves and nests accumulate, and the collars pull loose from the masonry. Homeowners on the older residential blocks near the Vernon border have told us they never noticed a problem because they don’t burn enough to trigger a full backdraft. The damage happens quietly, above their heads.
On a call off those older blocks near the Vernon border, our tech found a Gelco wood insert whose bi-fold glass doors had sagged shut after years of no use. The original damper was rusted wide open under a chase cover that had blown off. The uncovered rear flue had collected leaf litter and a bird nest, and the collars had pulled loose from the masonry. We cleaned the flue, reseated the insert-to-masonry seal, freed and serviced the damper, rehung the doors, and fit a new chase cover so rain couldn’t pour in again. That’s a Commerce call through and through.
Gelco Models & Products We Service in Commerce
We service the full range of Gelco fireplace equipment found in Commerce homes. That includes Gelco gas fireplace inserts, especially the millivolt standing-pilot units common in 1980s and 90s retrofits, along with Gelco wood-burning inserts with bi-fold glass doors, Gelco fireplace glass door and screen enclosure sets, and Gelco aftermarket fireplace dampers and flue components.
When factory Gelco parts are available, we use them. Pilot assemblies, thermocouples, dampers, and door hardware come from Gelco or reputable aftermarket sources when factory components are discontinued. We’re not married to OEM if a quality aftermarket hinge or flue collar does the job better. The goal is a sound, working Gelco unit, not a brand loyalty exercise. We stock common Gelco-compatible hardware for faster turnaround on Commerce service calls, so you’re not waiting weeks for a discontinued part to ship from somewhere across the country.
See the difference
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AfterGelco Service Pricing in Commerce
Gelco chimney cleaning in Commerce follows the same cost structure as our broader chimney sweep service in the area. A standard chimney sweep and inspection typically runs $189 to $329. Level 2 inspections land between $350 and $600, depending on access and what the camera reveals. Gas fireplace service and damper repair are quoted individually after we see the unit.
What drives the cost in Commerce specifically is access. Tight lots, converted rear structures, and shared rooflines can make getting to the flue more involved, and if we’re replacing a chase cover or resealing an insert-to-masonry collar, that’s added labor and materials. We don’t guess at prices over the phone. A free estimate includes a direct look at your Gelco unit and flue, a clear line-item quote, and our honest recommendation on Gelco service in Cudahy or repair versus replacement. Call (855) 341-3461 to schedule one.
Serving Commerce, CA — Our Local Coverage Area
We’re based in the Commerce 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 – Gelco Chimney Cleaning in Commerce
It’s usually one of two things: a clogged pilot orifice that needs cleaning, or a corroded thermocouple that needs replacement. In rarely-burned Commerce fireplaces, the pilot assembly sits for months collecting dust and moisture, which is why the problem shows up on the first cold night. We test the thermocouple first, clean the pilot, and only recommend a part replacement if the component has actually failed. Call (855) 341-3461 for an exact diagnosis.
The most common cause in Commerce is a cold, blocked, or cross-vented flue. Your Gelco unit needs a clean, warm flue to establish draft, and if the flue has been sitting uncovered since the last rain or the insert-to-masonry seal has degraded, smoke backs up into the room. We clean the flue, check the damper, and reseal the collar if it’s leaking. Call (855) 341-3461 and we’ll sort it out.
Yes. We work on Gelco inserts in converted garages and rear additions throughout Commerce. These installations are often more complex because the flue shares a roofline with the converted structure, or the chase cover is missing entirely. We inspect the full venting path and address the insert, the flue, and the chase as one system. Call (855) 341-3461 to schedule a free estimate.
You can almost always fix the glass doors and damper rather than replacing the unit. We rehang sagging bi-fold doors, free rusted dampers, and replace worn hinges, tracks, and top-sealing mechanisms. A full replacement is only on the table when the firebox or flue collar is actually compromised. We’ll show you the evidence either way. Call (855) 341-3461 and we’ll give you an honest reading.
Even if you only burn a few fires a year, your Commerce chimney should be swept and inspected annually. In our dry, smoggy inland-basin air, leaf litter, bird nests, and old creosote accumulate in unused flues, and a winter rain followed by a few fires can turn that quiet buildup into a smoky backdraft or worse. Annual service catches the problem before it becomes one. Call (855) 341-3461 to book yours.
Service Areas Near Commerce
Walnut Chimney provides Gelco service throughout Commerce and the surrounding communities. Our technicians regularly work in Gelco service in South El Monte, Gelco service in Maywood, Vernon, Bell, and East Los Angeles. If you’re in a neighboring city with a Gelco insert, we’re likely already working nearby and can add you to the route.
Book Your Gelco Service in Commerce Today
If your Gelco insert needs cleaning, service, or repair in Commerce, call Walnut Chimney at (855) 341-3461. Estimates are free, and we’ll tell you honestly what your unit needs, whether it’s a simple sweep, a damper tune-up, or a full Level 2 inspection. We’re independent, we’re local to the San Gabriel Valley, and we know Commerce’s quirks as well as any chimney crew working this side of the 5 and 710.
Written by Russ Dempsey, Owner at Walnut Chimney, providing independent Gelco service throughout Commerce and the surrounding San Gabriel Valley.