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The Goodman B1392139 is a genuine OEM view port bushing for the DMP150-52AA furnace. This small but essential grommet seats in the burner-compartment sight port, providing a heat-resistant seal around the inspection window so technicians can safely observe the burner flame while maintaining the compartment's air integrity. A missing or degraded bushing can allow air leakage that affects flame stability and combustion.
Genuine B1392139 is molded to the exact port diameter and temperature spec of the furnace. Generic grommets may not seal fully or can deform near the heat exchanger, compromising the combustion-air seal. For a part this close to the flame, OEM is the reliable choice.
Easy (1/5). Press-fit replacement — pop out the old bushing and seat the new one in the port. No tools required. Cut power before opening the burner compartment.