Gas Fireplace Cleaning in Thousand Oaks: Written Report, Licensed Technicians

A couple in Oak Park called us last November after noticing a sharp, acrid odor whenever they turned on their gas fireplace. They'd converted from wood-burning about eight years ago, but the original chimney had never been properly cleaned before the gas insert went in. Years of creosote from heavy wood burning were still caked inside the flue liner. Every time the gas unit heated the flue, those old deposits released fumes into the room. The wife mentioned headaches. Their CO detector hadn't gone off, but they didn't trust it anymore because the battery was three years old. They wanted someone to look at the whole system, not just the gas logs.

We hear versions of this call regularly from homes along the Agoura Hills border and the Kanan Road corridor, where 1970s and 1980s ranch-style houses were built with oversized masonry fireplaces meant for burning oak and eucalyptus. Many of those fireplaces now have gas inserts, but the chimneys behind them still carry residue from decades of wood fires. That residue doesn't just disappear when you switch fuels. If your gas fireplace smells off, produces soot on the ceramic logs, or has a pilot light that won't stay lit, those are signs the system needs more than a quick wipe-down. Book an inspection with Westbrook Chimney Experts and we'll tell you exactly what's happening inside the flue.

We ran a Level 2 camera inspection per NFPA 211 standards, which is the right call any time a fireplace has been converted from one fuel type to another. The scan showed 2nd-degree creosote deposits along the upper third of the clay tile liner, plus a hairline crack near the smoke shelf that had likely been there since before the gas conversion. The gas insert itself needed work too. The thermocouple was reading intermittently, causing the pilot assembly to cycle off under load. We cleaned the burner ports, replaced the thermocouple, and tested the venting to confirm proper draft. On a vented unit like this one, draft matters because incomplete combustion gases need a clear path out.

We also checked the ceramic logs for heat damage. Two had visible fractures, which can redirect flame contact toward surfaces that aren't designed for direct heat. After the full cleaning and component replacement, we verified carbon monoxide levels at the firebox opening and at the nearest room register. Both read zero. The homeowner replaced their CO detector that same week. If you're in Oak Park, along the Kanan Road corridor, or anywhere in Thousand Oaks running a gas fireplace in a chimney that used to burn wood, don't assume the old creosote is harmless. Call Westbrook Chimney Experts for a gas fireplace cleaning that accounts for what's behind the insert, not just what's in front of it.