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The Goodman B1392139 View Port Bushing is the genuine OEM sight-glass grommet that seats into the burner observation port on the DMS80453ANA gas furnace. It seals the viewing window in the burner compartment so you can safely inspect the flame while keeping the combustion area airtight. A cracked, brittle, or missing bushing lets air infiltrate the burner box and can trip flame-sensing faults — replacing it restores a clean seal.
This is a factory-original Goodman component engineered to the exact bore and high-temperature rating of the burner port. Generic bushings are often the wrong durometer and can shrink or harden near the combustion zone. For a leak-free, code-correct seal, the OEM part is the safe choice.
Easy (1/5). Power down the furnace, pop the old bushing out of the port, and press the new one in — no tools required. Under 5 minutes for most DIY owners.