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Bard 552-269-6 is an OEM blower door assembly used on select Bard wall mounted HVAC units to close off the blower compartment and maintain proper cabinet sealing for stable airflow, correct static pressure, and consistent cooling or heating performance. Replacing a bent, leaking, or damaged blower door helps reduce air bypass and helps protect internal components from debris intrusion while keeping service access straightforward for routine maintenance. Verify compatibility by matching the full Bard part number and your unit model and serial information before ordering.