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 Walnut, CA | Walnut Chimney
Gelco chimney cleaning in Walnut typically runs $189 – $329 for a standard sweep and Level 1 inspection, depending on the fireplace type and how long it’s been since the last service. We’re an independent Gelco service provider, not manufacturer-authorized or sponsored, and we work on direct-vent gas units, factory-built wood-burning inserts, and Gelco caps and terminations across the 91788, 91789, and 91795 ZIP codes. The one thing that makes our Gelco work here different: we understand how Walnut’s Spanish-tile roofs and stucco chase enclosures complicate cap access and flue debris in ways a generic sweep company doesn’t. Call (855) 341-3461 for a free estimate.

Why Walnut Residents Choose Us for Gelco Service
Russ Dempsey, our owner, grew up off Amar Road in Walnut and still lives about ten minutes from where he learned to ride a bike. He picked up the fundamentals of sheet metal and venting systems through the HVAC program at Citrus College in Glendora, then spent his first years doing fireplace retrofits and cleanouts on the older ranch homes scattered across the San Gabriel Valley before focusing exclusively on chimneys. That two-decade background means we’ve seen Gelco direct-vent units installed in every configuration Walnut’s tract housing throws at us: chases packed with eucalyptus leaves, liners that were never sized right, caps that don’t match the vent termination. We show up with Gelco-compatible OEM and quality aftermarket parts on the truck so most cap and damper corrections get done in one visit. And we’ll tell you straight when a repair is the right call versus when a unit has hit the end of its service life. See our full Gelco sales & service background for more on how we approach this equipment.
Styles & brands we work with





Common Gelco Chimney Cleaning Problems We Solve in Walnut
- Side-wall vent blockage from Santa Ana debris. Gelco direct-vent units in Walnut’s hillside tracts near the 60 Freeway corridor catch eucalyptus leaves and ash blown straight into the termination during fall wind events. The result is draft failure and smoke rollout on first light-up. We clear the chase, inspect the vent sections, and install a proper Gelco-compatible cap.
- Bird and rodent nesting in wood-framed chases. Walnut’s 1980s-2000s stucco homes often have factory-built Gelco fireplaces enclosed in exterior chases that collect nesting material year-round. That debris restricts draft and sends smoke into the living room on the first cool evening. A sweep plus chase inspection fixes it.
- Post-construction stucco dust coating the firebox. Walnut’s ongoing room-addition and infill work pushes fine stucco and drywall dust into flues and venting. It masks small cracks and compromises the flame sensor on gas units. We see this constantly on Gelco systems after remodels.
- Slow creosote glaze in rarely used wood-burning inserts. Walnut’s mild climate means fireplaces run mostly during holiday months and cool winter evenings. That sparse use creates a deceptive glaze rather than heavy creosote, so owners skip annual sweeps. A Level 1 inspection catches what the eye can’t.
- Caps and terminations that don’t match the vent configuration. Builder-grade Gelco installations in Walnut often got whatever cap was on the truck that day, not the one the vent design called for. Mismatched caps let rain and debris in. We stock Gelco-compatible multi-flue caps and correct the termination properly.
Gelco Service in Walnut: What Local Conditions Mean for Your Equipment
Walnut’s 1980s-2000s Mediterranean stucco tract homes sit under Spanish-tile roofs that make chimney cap access slower and more delicate than the flat-tile neighborhoods next door. A tech who’s never worked this tile profile will walk the roof wrong, crack a tile, and leave you with a leak that has nothing to do with your fireplace. We schedule Gelco service in West Covina and cap and crown work in Walnut with extra roof-protection time built in, because we know the tile layout on the hillside tracts off Amar Road and along the 60 corridor demands it. When we pull a Gelco cap on one of these homes, we’re moving across S-curved tile that shifts underfoot, so we lay protection boards and work from the eaves where possible. That’s not a line item we upcharge; it’s just how the job gets done here without damaging a roof that costs more than the fireplace service. If the flue’s clean and the draft is right, everything else takes care of itself. But getting to that flue safely on a Walnut Spanish-tile roof is the part generic sweep companies underestimate.
Gelco Models & Products We Service in Walnut
We clean and repair Gelco direct-vent gas fireplace systems (the DV series), Gelco factory-built wood-burning fireplaces with rigid chimney sections, Gelco vent-free and decorative gas log sets, and Gelco multi-flue chimney caps and terminations. For parts, we carry Gelco-compatible OEM caps, dampers, and vent sections so most Walnut terminations can be corrected in one visit rather than waiting on a shipped part. We’re independent, which means we can pull from the right aftermarket option when an OEM part is backordered or discontinued. For a sound Gelco insert, repairing the cap, damper, or firebox lining is almost always the better call than replacing the whole unit. We only push a full swap when the firebox or venting is cracked or structurally compromised. Check our Walnut service area page for coverage details.
See the difference
Before
After
Before
After
Before
AfterGelco Service Pricing in Walnut
Gelco chimney cleaning in Walnut ranges from $189 to $329 depending on fireplace type and access. A standard sweep with Level 1 inspection on a direct-vent gas unit runs toward the lower end. Factory-built wood-burning units with rigid sections land mid-range. Cap replacement adds material cost, typically $120-$280 for a Gelco-compatible multi-flue cap, with the labor folded into the visit. The variables that shift the quote: how long since the last sweep, whether we’re working over Spanish tile, and whether the chase needs debris clearing. Every estimate includes the inspection, and we walk you through what we found before recommending anything. Call (855) 341-3461 for an exact quote, estimates are free.
Serving Walnut, CA — Our Local Coverage Area
We’re based in the Walnut 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 Walnut
Yes. A direct-vent gas unit doesn’t produce creosote, but it does accumulate dust, insect debris, and sometimes bird nesting material in the chase and termination. In Walnut, the dry Santa Ana winds push eucalyptus leaves and ash into side-wall vents, which is exactly what causes draft failure and smoke rollout. A Level 1 inspection and cleaning every year or two keeps the vent path clear. Call (855) 341-3461 to schedule one.
First-light smoke rollout in Walnut almost always traces to a blocked termination, a restricted chase, or a damper that’s not fully open. We commonly find eucalyptus leaves packed into the side-wall vent after fall wind events, or nesting material accumulated through the summer. A sweep and chase clearing resolves it. Call (855) 341-3461 and we’ll get it sorted before the holidays.
Yes, and we do it regularly across Walnut’s 91788, 91789, and 91795 ZIP codes. Spanish tile requires roof protection boards and a different walking pattern than flat tile, but it’s not a barrier. We’re experienced with the S-curve profile on 1990s tract homes here, and we schedule the extra time so the job is done without cracking tile, just as we do for South San Jose Hills Gelco service.
We’d advise against it. Stucco and drywall dust is abrasive and can scratch the firebox or clog the burner ports if you wipe it the wrong way. Worse, the dust often masks small cracks in the firebox or venting that a trained eye catches during a Level 2 inspection. Let us handle the cleanup and the inspection together. Call (855) 341-3461 for a free estimate.
For a sound Gelco insert, repairing the cap, damper, or firebox lining is almost always the better call than replacing the entire unit. Walnut’s climate means these fireplaces see light seasonal use, so the units themselves rarely wear out. We only recommend replacement when the firebox or venting is cracked or structurally compromised. Call (855) 341-3461 and we’ll tell you plainly which side your unit falls on.
Service Areas Near Walnut
We serve Walnut and the surrounding San Gabriel Valley communities. If you’re outside Walnut proper, we also cover nearby areas including Garden Grove, Midway City, Stanton, Westminster, Anaheim, and Fountain Valley. For Gelco service in Bell Gardens, see Gelco service in Bell Gardens. For Gelco work in Compton, visit Gelco service in Compton.
Book Your Gelco Service in Walnut Today
We keep Walnut’s Gelco systems clean, safe, and venting properly year-round. Russ Dempsey and the Walnut Chimney team are ready when you are. Call (855) 341-3461 for a free estimate and we’ll schedule your sweep at a time that fits.
Written by Russ Dempsey, Owner at Walnut Chimney, serving Walnut and the San Gabriel Valley for over two decades.