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Bard part number 152-301-4 is an OEM blower door used on select Bard wall mounted HVAC units to close off and protect the blower compartment while maintaining the intended air path through the indoor section. A properly fitting blower door helps prevent air bypass, reduces cabinet air leaks that can impact airflow and comfort, and provides the correct access point for service and filter or blower maintenance depending on the model. If your original door is damaged, missing, or no longer sealing correctly, replacing it with the correct Bard 152-301-4 door helps restore proper unit fit and service access while keeping the blower area enclosed as designed.