Proudly American
Locate the piece in the appliance drawing
The rear wall, side return and floor can have different parts and attachment methods. A fragment below the burner does not by itself identify where it came from. Keep a photograph of the complete cold firebox as seen through its normal viewing area. Ask a technician to match the component to the installed model's parts diagram rather than treating molded mortar lines as evidence of site-built brickwork.
Keep three meanings of liner separate
A decorative interior panel, a masonry firebox lining and a flue liner are different items. A quote that says “replace liner” should tell you which one is damaged. For a listed gas fireplace, ask whether the manufacturer specifies the component individually or in a kit and whether it has model, size or serial limits. A surface coating or masonry patch may not be an approved repair.
Evaluate a finish change alongside the repair
A replacement kit in a different pattern may be offered on some models; that is a compatibility question before it is a color choice. Ask whether installation affects the log arrangement, glass service or adjacent pieces. Retain the kit identification so that a future owner does not have to guess why the interior now looks different from the original sales photograph.