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 Damper Repair: The Fresno Owner’s Guide
Gelco damper repair in Fresno typically costs $240 to $485 installed, and yes, we carry the common Gelco replacement parts on our trucks, so most jobs are done in a single visit. Most Fresno owners discover theirs has failed on the first cold morning when a draft rolls down the chimney and the fireplace feels more like a window that got left open. Tell me what you’re seeing and I’ll tell you what it actually means.
We’re Ruben Castellano’s crew at Alcott Chimney Fresno, and we’ve repaired Gelco dampers in homes from the Tower District to Clovis and up toward Woodward Park for years. This page covers which Gelco models we work on, what fails first, what the repair actually costs, and whether you should even consider touching it yourself. Short version: most Gelco damper failures are mechanical, they’re repairable or replaceable in under an hour, and the parts are straightforward if you know the series. Let’s get specific.
Which Gelco Models This Applies To
We service and repair the full Gelco top-sealing damper line, including the standard Gelco round and oval top-mount dampers, the Gelco Lyemance-style pivot dampers, and the Gelco cable-operated units common on pre-fab and masonry fireplaces throughout Fresno. The key compatibility gotcha with Gelco is the damper diameter: these units come in common throat sizes from 6 to 13 inches, and the mounting collar is sized to the inner flue tile, not the visible fireplace opening. Measure the flue interior at the throat, not the firebox, or you’ll order a damper that’s an inch off and won’t seal.
For OEM versus aftermarket: Gelco’s original cast-aluminum damper assemblies hold up well, but the cable and spring mechanism is where Fresno heat takes its toll. We install genuine Gelco replacement parts on warranty-sensitive jobs, and we’re also comfortable with quality aftermarket equivalents like the top-sealing damper repair kits from Copperfield or Olympia for older Gelco units where the OEM part has been discontinued. The practical difference is availability: some Gelco series originated 20-plus years ago, and the OEM seal ring for those older models is no longer manufactured. When that’s the case, we’ll say so upfront and show you the aftermarket option that fits before any work happens.
Styles & brands we work with
Signs Your Gelco Damper Repair Is Failing
Most dampers don’t fail all at once. They go through a decline, and Fresno’s dry summers plus winter fireplace use accelerates it. Here’s what we actually find when a homeowner calls us out:
- The cable pulls but the damper doesn’t move – the cable has either frayed, slipped out of its clamp at the bracket, or the spring at the top has seized from heat exposure and soot. This is the most common failure we see on Gelco dampers that are 10-plus years old.
- Visible daylight around the damper edges when closed – the seal ring on the damper blade has flattened or cracked from repeated heating cycles. Fresno’s hot attic air in summer bakes these seals, and they lose their compression memory.
- A cold draft even when the damper is fully shut – the damper isn’t seating flat against the top collar. On older homes near the Tower District, slight chimney settling can shift the flue tile just enough that a rigid damper no longer seals.
- Rodent or bird noise from inside the chimney – a failed Gelco top damper leaves an open flue. Squirrels in Fresno love unsealed chimneys when housing stock from the 1970s and 80s has slightly oversized flues with no cap.
- Smoke backs up into the room on startup – the damper isn’t fully open, or it’s partially collapsed and blocking airflow. This one is a call-us-now situation, because it means your flue isn’t exhausting properly.
Replacement Cost & What’s Included
In Fresno, a full Gelco damper replacement runs $310 to $485 installed, depending on flue size and whether it’s a cable or pivot mechanism. A repair of the existing unit, like a new cable, spring, or seal ring, typically lands between $180 and $260. If the damper flange or mounting collar is damaged, that pushes the job toward replacement because the top plate has to come off anyway.
Every price we give is written before we start. It includes the part, labor, and removal of the failed unit. What it also includes, on every repair we do: a written guarantee. If the damper fails again within the coverage period, the second visit and repair are on us. No fine print, no restocking fee, no “well, that’s a different part.” That’s the 365-Day Done Right Promise, and it’s part of every job we’ve done since 2002.
See the difference
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AfterDIY or Call Us?
Here’s the honest split. You can visually inspect the cable and bracket mounting from inside the firebox with a flashlight, and you can check whether pulling the handle moves the cable at all. That’s useful information when you call us, and it’s safe to do from floor level. What you shouldn’t do is climb onto the roof to inspect the top-mount damper. Fresno roofs in mid-summer are hot enough to turn a routine look into a fall, and the damper on a two-story northeast Fresno home sits at a height where a slip becomes serious. Chimney work at elevation is where we earn our keep, and it’s not worth a driveway ladder and a gut feeling.
Most Gelco repairs are under an hour of ladder work once the technician is on the roof. If you’re not certain whether you need a repair or a replacement, call (559) 215-1714 and describe what you’re seeing when you work the handle. We’ll be able to tell you, before anyone comes out, which end of the price range you’re likely in.
FAQs
Realistically, 12 to 18 years before the seal ring or cable needs attention. Fresno’s summer heat and winter fireplace use cycle these parts harder than coastal climates, and we regularly see Gelco dampers from the mid-2000s reaching end of life now. If yours is older than that and you’re noticing drafts, call us for an assessment rather than waiting for a full failure.
Yes, in most cases where the damper blade and collar are intact. The cable, spring, and seal ring are all replaceable individually, and we stock the common sizes for Gelco units on the truck. Replacement only becomes necessary when the blade warps, the collar cracks, or the unit has been in place long enough that the seal surface is beyond saving.
Plan on 45 to 90 minutes for most single-unit repairs, from ladder setup to cleanup. If the replacement requires a custom-fit seal or the chimney crown needs sealing work around the damper base, it’ll run toward two hours. We’ll tell you the time estimate when we give you the written price.
Yes. We carry the common Gelco replacement cables, springs, and seal rings in the sizes we see most throughout Fresno, along with parts from DuraFlex and HeatShield for other chimney repairs. If your unit needs something outside that, we’ll have it in hand within a couple of days and give you a firm date before we leave the first visit.
Ready to Get Your Gelco Damper Fixed?
If your Gelco damper is letting drafts in, smoking up the house, or the cable just swings loose when you pull it, call us at (559) 215-1714. You’ll get a live person, a straight answer on what the repair likely involves, and a written price before any work starts. We’ve been keeping Fresno fireplaces working since 2002, and every job comes with the same guarantee: if our repair fails, we come back and fix it free. That’s the deal.
Written by Ruben Castellano, Owner, Alcott Chimney Fresno at Alcott Chimney Fresno, serving Fresno and nearby areas.