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 Fireplace Repair in San Jose: What to Know First
Gelco fireplace repair in San Jose typically runs between $185 and $650 depending on what’s actually wrong, and most jobs are completed in a single visit. Ashby Chimney San Jose is an independent Gelco service provider (not affiliated with or authorized by Gelco) and we repair Gelco gas fireplaces, wood-burning units, inserts, dampers, fireboxes, and pilot assemblies across San Jose. If you own a Gelco unit that’s acting up, call (669) 266-5073 and we’ll give you a written price before any work begins.
This page is for San Jose homeowners with a Gelco fireplace that won’t start, won’t stay lit, or has started making sounds it shouldn’t. Maybe you’ve already had someone out and the problem came back. Maybe you’ve been told you need a whole new unit and you’re not sure you believe it. Either way, here’s what we know about these fireplaces after years of working on them in San Jose homes, from Cambrian Park to the Rose Garden.
Key Takeaways
- Gelco fireplaces share common failure points across their gas and wood-burning lines: pilot assemblies, thermocouples, limit switches, and damper hardware are the usual suspects.
- Most Gelco repairs in San Jose cost between $185 and $650, with a written quote before we touch anything.
- We source parts carefully because not all aftermarket components fit Gelco burners correctly, and some will void remaining warranty coverage.
- Every repair carries our 365-Day Done Right Promise: if it fails within the guarantee period, we return and fix it at no charge.
Styles & brands we work with





How Gelco Products Fail, and How We Fix Them
Gelco built a reputation for straightforward, serviceable fireplaces, and we still see plenty of their gas log sets and prefab wood-burning units in San Jose homes. Most of their designs are simpler than some of the high-end sealed systems out there, which means repairs are usually practical rather than hopeless. Here are the failures we see most often on Gelco equipment specifically:
- Gelco gas log sets with pilot assemblies that drop out. The most common call we get is a flame that ignites and then shuts off within a minute or two. On Gelco units with millivolt controls, this usually traces to a weak thermocouple or thermopile that no longer generates enough signal to hold the gas valve open. We replace the pilot assembly with a correctly rated part, check millivolt output at the valve, and verify the flame impinges on the sensor properly. It’s a $230 to $350 repair on most Gelco sets.
- Burner ports clogged with San Jose’s fine dust and spider debris. Gelco burners use relatively small port openings, and the dry, dusty air that settles into San Jose garages and living rooms eventually works into the burner tube. The result is uneven flame, yellow sooting, or a burner that won’t light at all. We pull the logs, remove the burner, clean each port with the right-sized tool, and test gas pressure before reassembly. This is a $175 to $275 job on most units.
- Gelco wood-burning prefab units with warped damper assemblies. The dampers on older Gelco prefab fireplaces were made from thinner steel than some competing brands, and years of heat cycling in San Jose’s mild but damp winters eventually bends them. A warped damper won’t seal, which means conditioned air leaks up the flue all year and smoke backs up on start. We replace the damper assembly or, where the frame is still sound, install a top-sealing damper. Cost depends on the specific Gelco model and whether the flue is accessible from the roof.
- Ember bed and refractory panels cracked in Gelco prefab boxes. The refractory side panels in some Gelco prefab fireplaces crack after the first decade of regular use. If the crack is hairline and the structure behind it is sound, we can often repair rather than replace. If the panel has shifted or the firebox has warped, that changes the conversation, and we’ll show you camera photos of what we’re seeing before we recommend anything.
- Gas valve failures on Gelco inserts from the late 2000s. We see a cluster of Gelco inserts built between roughly 2006 and 2011 where the original gas valves begin to stick or fail to open fully. The symptom is usually a fireplace that works intermittently, fires on the first try some days and not others. We source a compatible valve, confirm the model number against the unit’s data plate, and complete the swap with a full leak test at every connection.
One San Jose-specific note: the clay-heavy soil in parts of Evergreen and Almaden means some homes see more settling than others. If your Gelco fireplace has started pulling away from the wall or the hearth slab has shifted, that’s a structural issue, not a fireplace defect, and we’ll tell you plainly when the right next step is a contractor, not a chimney company.
Our Gelco Fireplace Repair Process
When you call (669) 266-5073, a live person answers. No phone tree, no callback form. We’ll ask about the symptoms, schedule a window that works, and give you a quote range before we arrive. Here’s what happens after that:
- 1
We show up in the scheduled window, in uniform, and with the right diagnostic tools for Gelco equipment. Nathan Corliss or one of our San Jose techs will walk through the symptom history with you before touching anything.
- 2
We diagnose against the Gelco data plate and model number. Every Gelco unit has a rating plate, typically on the side of the firebox or the burner tray. We match the unit to the correct parts rather than guessing from a photo.
- 3
We give you a written quote for the repair before any work starts. This is the Kingswell Way: say the price first. If the problem turns out to be simpler than expected once we’re inside, the price goes down, never up.
- 4
We complete the repair using parts that fit the unit correctly. Where the original Gelco part is still available, we order or install it. Where an aftermarket part is the better call on cost or reliability, we’ll tell you which brand we’re using and why, and confirm that it won’t void anything still covered under your appliance warranty.
- 5
We test the system end to end. Gas pressure, flame pattern, thermocouple output, damper operation, no leaks at any connection. A Gelco fireplace that lights in front of us but fails after we leave is not a completed repair.
- 6
You get a written guarantee. The Kingswell Guarantee covers every Gelco repair we complete. If it fails within the guarantee period, we return and fix it at no charge. That’s the 365-Day Done Right Promise, and it’s included on every job, not sold as an add-on.
We leave the hearth cleaner than we found it. We carry a clean tarp for every job and a vacuum rated for fireplace debris. Say the price first, explain the work, put the promise in writing.
See the difference
Before
After
Before
After
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AfterWhat Gelco Fireplace Repair Costs in San Jose
Here are the dollar ranges we most often quote for Gelco work in San Jose, based on what we’ve actually billed over the last few years:
- Pilot assembly replacement (most Gelco gas log sets): $230 to $350
- Thermocouple or thermopile replacement: $185 to $260
- Burner cleaning and gas pressure adjustment: $175 to $275
- Damper replacement (wood-burning Gelco prefab): $320 to $550 depending on flue access
- Gas valve replacement (Gelco inserts): $420 to $650 including part and leak testing
- Refractory panel repair or replacement: $240 to $480 per panel depending on model
What moves the price is parts availability for your specific Gelco model, whether the flue is accessible from the roof or requires interior scaffolding, and the age of the unit. Older Gelco models sometimes require a longer parts search, and we’ll always tell you if we’re waiting on a backordered component rather than installing a dubious substitute. Every quote is free. Call (669) 266-5073 and we’ll give you an exact number in writing before any work starts.
Why San Jose Homeowners Call Ashby Chimney San Jose for Gelco Work
Most of our gelco repair calls start the same way: the homeowner already tried someone else, and the problem came back. We get it. That’s why our whole business is built around doing it right the first time and putting that promise on paper. Ashby Chimney San Jose has served the San Jose area since 2002, and we’re independently owned and operated under the standards of the Kingswell Guarantee. Nathan Corliss leads our San Jose crew, and he’d rather spend twenty extra minutes explaining what’s happening inside your fireplace than hand you a bill you don’t understand.
We work on Gelco equipment every month, which means we know the quirks of these specific units without a learning curve. And when a Gelco repair calls for a liner component or a heat barrier, we use established trade materials that fit the job correctly: DuraFlex, HeatShield, Gelco spec-matched parts, Olympia Chimney components, Famco caps and dampers, and Copperfield accessories. The right part, not whatever happened to be in the van. If you’re tired of repair people who don’t answer the phone or don’t show up, call (669) 266-5073. A real person answers, day or night.
FAQs
We can, and we take care to follow warranty-safe practices on every Gelco job. If your unit is still under manufacturer warranty, we’ll identify the covered components and work with you to determine whether filing a claim before paying out of pocket makes sense. Our labor carries its own written guarantee regardless of the appliance warranty, through the Kingswell Guarantee.
Most Gelco repairs in San Jose are completed in one visit, usually two to four hours on site. The variable is parts: common items like thermocouples, pilot assemblies, and dampers for popular Gelco models are typically in stock or available within a few days. Less common model parts can take a week or more, and we’ll tell you honestly before you commit to the repair.
We use the part that fits correctly and serves you best. Where the original Gelco part is available at a reasonable price, that’s what we install. Where an aftermarket component from a recognized chimney-trade brand performs as well or better at a lower cost, we’ll show you the option and explain the trade-off. No mystery parts, no markup surprises. Call (669) 266-5073 and ask Nathan directly if you want the full rundown on a specific component.
That depends on what’s wrong and the condition of the firebox itself. A bad thermocouple or pilot assembly is a reasonable repair even on an older Gelco unit, and it can buy you many more years of service. But if the firebox is rusted through, the refractory is crumbling, or the gas valve has failed on a unit that’s already seen 20 Bay Area winters, replacement might honestly be the better value. We’ll show you camera photos of what we’re seeing and give you our straight recommendation, not the one that pads our invoice.
Best case, the unit stops working completely and leaves you without heat in January. Worse case, a failing gas valve or a cracked firebox allows combustion gases where they don’t belong. Carbon monoxide is invisible and odorless, and a fireplace that’s burning badly can put it into your living room. If your Gelco unit is acting strange, smell gas, see soot on the glass, or hear popping, don’t push through one more fire. Call us at (669) 266-5073 for a free estimate, and we’ll tell you what’s actually going on.
Written by Nathan Corliss, Owner, Ashby Chimney San Jose at Ashby Chimney San Jose, serving San Jose and nearby areas.