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.
Before
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AfterGelco Fireplace Services in Ashburn: What to Know First
We provide independent Gelco fireplace services across Ashburn, from routine gas fireplace tune-ups to firebox rebuilds on older wood-burning units. Most Gelco jobs we book are completed in a single visit, and we’ll tell you plainly whether a repair is worth doing or if you’re throwing money at a unit that’s reached its end. Our estimates are free, our pricing is upfront, and the number we quote is the number on the invoice.
This page is for Gelco owners in Ashburn who want a technician who knows the difference between a Series 90 direct-vent and a pre-2008 wood insert, and who won’t treat your fireplace like a generic black box. If that sounds like you, call (571) 701-8135. A live person answers, 24 hours a day.
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.
How Gelco Products Fail - and How We Fix Them
- Series 90 direct-vent gas fireplaces: The pilot assembly on these units tends to soot up faster than comparable Lennox or Majestic models, especially in Ashburn’s hard water zone where mineral residue builds on the thermopile. We disassemble and clean the pilot orifice with OEM-spec wire gauges, test millivolt output under load, and replace the generator only when it fails our bench test - not as a guess.
- Pre-2012 wood-burning inserts with factory refractory panels: Gelco’s original refractory mix from this era cracks vertically near the firebox floor after roughly 8-12 seasons of heavy use. The panels are NLA (no longer available) from Gelco, so we source HeatShield-compatible refractory or custom-cut panels from Copperfield that match the thermal rating without voiding your remaining chassis warranty.
- Factory-built chimney systems with Gelco chase covers: The galvanized steel covers used on 1990s Ashburn builds (especially in the older sections near Farmwell Station) rust through at the drip edge first, not the center. We spot this on camera inspection, fabricate a replacement from 24-gauge stainless or copper through Famco, and seal the chase top with proper counter-flashing - no more bucket-under-the-leak winters.
- Gas log sets with Gelco-branded burners: The ceramic fiber ember bed degrades to powder after about six years, and homeowners often assume the whole burner is shot. We separate the media from the valve, clean the burner ports with compressed air and a pick set, and replace only the ember material with Copperfield ceramic wool - saves roughly $400 over a full burner swap.
- Damper assemblies on conversion jobs: Gelco throat dampers on wood-to-gas conversions seize open when rust flakes lodge in the spiral gear. We remove the damper plate, media-blast the frame in our shop, lubricate with high-temp graphite, and reinstall with a new stainless cable. If the frame is too far gone, we retrofit a Lock-Top or Lyemance damper from Olympia Chimney with a matching block-off plate.
Our Gelco Fireplace Services Process
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Call intake: A live person answers, notes your model number if you have it, and schedules a window. No app, no callback queue.
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Level-2 camera inspection: Our tech arrives in uniform, runs a visual and camera inspection of the firebox, flue, and exterior termination, and documents everything with photos you can see on the spot.
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Plain-English verdict: We explain what’s wrong, what we can fix, and what can wait. If your Gelco part is NLA, we show you the aftermarket equivalent and explain any warranty considerations before you decide.
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Upfront pricing: You get a written estimate with one number. That’s the number on the invoice.
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The repair: Most Gelco jobs finish in one visit. We use professional-grade materials - Gelco OEM when available, DuraFlex or HeatShield when the repair calls for it, Copperfield or Famco for hardware.
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Test and guarantee: We fire the unit, check CO levels at the termination, and leave you with a written report and our 90-Day Done Right Promise. If it’s not right, we come back. In writing, no arguing.
What Gelco Fireplace Services Costs in Ashburn
| Service | Typical Range |
|---|---|
| Gas fireplace tune-up and safety check | $89-$175 |
| Pilot assembly cleaning or replacement | $185-$340 |
| Refractory panel replacement (per panel) | $280-$520 |
| Chase cover replacement (stainless) | $650-$1,200 |
| Damper repair or retrofit | $340-$680 |
| Full gas log set media refresh | $140-$260 |
What moves the price: accessibility (steep roofline, tight chase), part availability (some pre-2010 Gelco components are special-order), and whether we find secondary issues like a compromised flue liner that needs addressing. We show you the camera footage and explain every line before you approve anything. Call (571) 701-8135 for a free estimate - we’ll give you an exact number for your specific Gelco unit.
Why Ashburn Homeowners Call Hearthstone Chimney Co. for Gelco Work
We’ve been sweeping and repairing chimneys across Ashburn for well over a decade, from the mature colonials near One Loudoun to new construction along Loudoun County Parkway. Russell Haines trained at Los Angeles Trade-Technical College and has run more Gelco diagnostics than he can count. The flue doesn’t lie - and neither do we.
Our techs are background-checked, uniformed, and carry the full line of professional-grade materials: DuraFlex liners, HeatShield resurfacing, Gelco-compatible hardware from Copperfield and Famco, and Olympia Chimney components. Most jobs complete in one visit. Our 90-Day Done Right Promise is in writing, with no paperwork and no arguing. And when you call (571) 701-8135, a live person answers - every hour, every day.
FAQs
No. As an independent Gelco service provider, we use warranty-safe practices and OEM-spec parts where available. Gelco’s factory warranty on the firebox chassis typically covers structural defects for 20 years regardless of who services the unit, provided the work is documented and no modifications are made to the listed components. We document everything and will note on your invoice if a particular repair might affect remaining coverage. Call (571) 701-8135 if you want us to review your warranty status before we book.
Many parts, yes; some, no. Gelco discontinued several wood-burning insert refractory lines and certain gas valve assemblies after 2012. When OEM parts are NLA, we source quality aftermarket equivalents from HeatShield, Copperfield, or Famco that match the thermal and safety specs. We never substitute without showing you the part and explaining the trade-off. If your unit is too far gone to repair economically, we’ll say so plainly.
Replacement becomes the honest recommendation when the firebox or heat exchanger is cracked through, the flue collar is corroded, or parts cost more than 60% of a comparable new insert. We make that call only after camera inspection and photos you can see for yourself. Many “dead” Gelco units just need a pilot cleaning, a damper freeing, or a refractory panel swap. Call (571) 701-8135 for a free inspection - we’ll give you the real answer.
Once a year, before you start using it regularly. Ashburn’s temperature swings - hard freezes followed by warm spells - stress the gaskets and valves more than steady cold climates. Annual service catches degraded ember media, lazy pilots, and venting obstructions before they become safety issues. Our $89 Seasonal Tune-Up includes a full safety check, cleaning, and combustion test.
Creosote builds, dampers seize, and small cracks in the refractory become large ones. In Ashburn, where many Gelco units vent through exterior chases, water intrusion from a failed chase cover compounds the damage every freeze-thaw cycle. The real risk is a chimney fire or CO backup into the living space. We don’t scare-sell, but we do show you the camera footage and let the flue speak for itself. Call (571) 701-8135 for a free estimate - estimates cost nothing, and neither does the peace of mind that comes from knowing what you’re dealing with.
Written by Russell Haines, Owner & Master Sweep, Hearthstone Chimney Co. at Hearthstone Chimney Co., serving Ashburn and nearby areas.