Masonry repair
Sweep & inspection
Caps & crowns
Flue relining
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 Gas Fireplace Repair in Marietta: What to Know First
We repair Gelco gas fireplaces throughout Marietta as an independent Gelco service provider, and most jobs are completed in a single visit once the part is on hand. Gelco repair calls here typically run between $165 and $430 depending on what failed, and you’ll always see a written price before any work starts. If your Gelco unit won’t light, shuts off mid-burn, or is making a sound you’ve never heard before, call us at (229) 350-8952 and we’ll sort out a diagnosis.
This page is for Marietta homeowners with a Gelco gas fireplace that isn’t behaving. We’ll cover the failure patterns we actually see on these units, what repair costs, what’s worth fixing versus replacing, and how we handle the job from first call to the test burn. No scare tactics here. Just the straight version of what goes wrong and what it takes to make it right.
Key Takeaways
- Most Gelco gas fireplace repairs in Marietta run $165-$430, with the written price confirmed before we begin.
- Gelco units have specific failure patterns we see on a regular basis – many tied to the pilot assembly and gas valve, not the firebox itself.
- We’re not affiliated with Gelco, so we have no reason to sell you a replacement when a repair is the right call.
- Every repair comes with a written guarantee, and if it fails within the coverage period, the second visit is free.
How Gelco Products Fail – and How We Fix Them
Gelco built gas fireplaces and vent-free log sets, and the units we see most often in Marietta are their 30,000 to 45,000 BTU vent-free models, along with some direct-vent inserts from the mid-2000s. They were popular in the speculative housing boom that filled a lot of neighborhoods around Barrett Parkway and the Powder Springs Road corridor. The units themselves were built simply, which is good news for owners. Most failures are fixable without gutting the wall.
- The pilot won’t stay lit on a vent-free Gelco. This is the number-one call we get. The culprit is usually a dirty thermocouple or a pilot tube that’s partially blocked by dust and, in Marietta’s humid summers, a fine grit that collects fast. We clean the pilot assembly, test the thermocouple output, and replace it if it’s drifted out of range. In roughly three out of four calls, the valve itself is fine.
- The burner lights and then drops out after a few minutes. On Gelco units, this often points to the flame sensor rod losing contact. We see this more in homes that run the fireplace daily through winter. The fix is a careful cleaning and re-seating of the sensor rod, and we’ll test it through a full heat cycle before we leave. If it’s genuinely failed, it’s a modest part replacement.
- Yellow, lazy flames on a vent-free unit. This is a clogged burner port problem, and it’s rarely an emergency unless it’s paired with soot building fast. Georgia’s pollen season and residual drywall dust from remodels are common culprits. We pull the burner, clear the ports, and check the air shutter. A proper Gelco burn should be mostly blue with a clean yellow tip.
- The remote control or wall switch stopped working. Before assuming it’s the control module, we check the simple stuff: wiring connections to the receiver, batteries in both the remote and the receiver, and the position of the switch on the unit itself. A surprising number of “dead” Gelco fireplaces are just a battery holder with corrosion, which costs almost nothing to fix.
- The valve makes a clicking noise or the unit won’t shut off. On older Gelco gas valves, the solenoid can get slow or sticky. This is one repair where we lean away from quick aftermarket swaps and source the correct valve or a true OEM equivalent. It’s a gas train component, and sloppy substitutions there are not something we’ll do on someone’s fireplace.
Styles & brands we work with





Our Gelco Gas Fireplace Repair Process
Ruben Castellano has spent well over a decade on chimney and fireplace work, and the process he built at Alcott Chimney Marietta follows the same discipline: look first, explain second, write it down, then do the work. On Gelco jobs, that process looks like this:
- 1
Call and describe what you’re seeing. A live person answers at (229) 350-8952, around the clock. Tell us what the unit is doing or not doing. “Tell me what you’re seeing and I’ll tell you exactly what it means – no guesswork, no upsell.”
- 2
You’ll know who’s coming before they arrive. We send the technician’s name and photo ahead of the visit. Every Alcott Chimney Marietta tech is background-checked and identity-verified under the Threshold Standard, and they’ll show a photo ID badge at the door before stepping inside.
- 3
Diagnosis, in plain English. We test gas pressure, check the pilot assembly and thermopile output, inspect the logs and burner, and give you a direct explanation of what failed and why. You’ll always see the written price before we turn a wrench.
- 4
Parts decision, without the games. If a Gelco unit needs a part, we’ll tell you whether OEM, a quality aftermarket equivalent, or a professional trade-brand upgrade like what DuraFlex or HeatShield supply is the better value. No mystery parts, no vague line items.
- 5
Repair and test burn. We make the fix, restore the unit, and run it through a full cycle. We check for leaks at every connection, verify the flame pattern, and confirm the venting is working (on vented units).
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Written guarantee. Every Gelco repair is covered in writing. If the repair fails within the coverage period, the second visit is free. That’s the 365-Day Done Right Promise in action.
We leave the work area clean and walk you through what we found, what we did, and what to expect from the unit going forward. Most Gelco repairs take between 45 and 90 minutes on site.
See the difference
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After
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AfterWhat Gelco Gas Fireplace Repair Costs in Marietta
Here’s a straight answer for Gelco owners in Marietta, because “free estimate and a surprise later” is not how we do business. A diagnostic visit with a full safety check and no repair needed typically runs $89 to $125. If the unit needs a repair, the total usually lands between $165 and $430, depending on the part and labor.
- Pilot assembly cleaning, thermocouple replacement, or sensor rod service: $165-$280
- Burner removal, port cleaning, and air shutter adjustment: $190-$310
- Gas valve replacement (valve + labor): $280-$430
- Remote control or wall switch troubleshooting and repair: $145-$240
- Full diagnostic and safety inspection with no repair: $89-$125
What moves the price is access – if the unit is in a tight cabinet or has a rusted gas line that needs immediate attention – and whether the part is OEM Gelco or a quality aftermarket equivalent. We’ll show you the numbers before any work, in writing, so there’s nothing to un-spool at the end. For an exact quote on your Gelco, call (229) 350-8952. Estimates are free.
Why Marietta Homeowners Call Alcott Chimney Marietta for Gelco Work
Most homeowners don’t call a fireplace company because they love spending money. They call because something smells off, or a unit that worked fine last winter now just clicks and does nothing. Around here, that means a Marietta homeowner is making a decision about who to let into their home. We’ve built the whole company around making that answer easy.
Ruben and the Alcott Chimney Marietta crew have done thousands of hours of fireplace and chimney work across Cobb County, and we regularly work on the older homes along Kennesaw Avenue near Marietta Square, where Gelco units were installed during a big remodel wave and never quite got the service they needed. We service Gelco because they’re still in plenty of Marietta living rooms and they’re worth fixing.
We also work with DuraFlex and HeatShield systems, which matters when a Gelco unit turns out to need venting work or a liner repair beyond the unit itself. One call, one tech who understands the whole system. Every repair is written down, guaranteed, and quoted before work begins. You’ll know who’s coming before the truck shows up. That’s not a selling point. That’s our standard.
FAQs
If your Gelco unit is still under the manufacturer’s warranty, a repair done with OEM or manufacturer-approved equivalent parts by a qualified independent service provider generally does not void the warranty. We keep records of the parts used and the work performed for exactly this reason. We’re an independent provider, not a Gelco-authorized shop, but we follow warranty-safe practices and we’ll tell you plainly before any work if a repair might run against a warranty term.
Most common Gelco parts – thermocouples, thermopiles, pilot assemblies, gas valves, and burner components – are still available through the professional supply chains we use. The aftermarket has filled in most of what Gelco’s original distribution once covered. The rare exception is a proprietary control board on certain late-model units, but we don’t see many of those in Marietta. We’ll tell you before you spend a nickel if your unit is entering “not worth fixing” territory, and we’ll show you the numbers so you can decide.
For most Gelco repair calls, we can schedule within a few days, and if you called because the unit won’t light and it’s the middle of heating season, we’ll often get there faster. We don’t overpromise a one-hour miracle, because we’d rather send the right tech with the right part than send someone to look at it and tell you they’ll be back. Call (229) 350-8952 and we’ll give you a real window.
Yes, and in Marietta and much of North Georgia, that’s usually dust and pollen that settled on the burner and logs during the off-season. The first burn of the season typically burns it off in 15 to 20 minutes. But if the smell lingers, or you notice soot on the glass or walls, or the flame pattern looks abnormal, shut the unit off and call us. A correctly burning Gelco vent-free unit should not produce a persistent smoky smell under normal operation.
Some Gelco issues are annoyances. A pilot that won’t light is that. But a gas valve that’s slow to shut off, or a burner that’s yellow and sooting, is a different matter. On a vent-free unit, a dirty burner can produce carbon monoxide instead of a clean burn, and that’s not a gamble any Marietta home should take. If the unit is doing something it didn’t do last year, call (229) 350-8952 for a diagnostic. The peace of mind costs less than a dinner out, and we’ll tell you honestly if the unit can wait or not.
Written by Ruben Castellano, Owner, Alcott Chimney Marietta at Alcott Chimney Marietta, serving Marietta and nearby areas.