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Bard part 8201-152 is an OEM 24-volt post purge timer used in Bard wall-mounted HVAC equipment to keep the blower or ventilation circuit running for an adjustable time after a call ends, helping clear residual heat and stabilize airflow through the unit. With an adjustable delay range of approximately 12 to 390 seconds, this timer supports proper shutdown sequencing and can help reduce nuisance complaints tied to short cycling or lingering warm air in the cabinet. If you are troubleshooting a unit where the fan run-on is incorrect or inconsistent, replacing the timer with the correct Bard 8201-152 helps restore factory timing and reliable operation; always confirm wiring and timing settings match your Bard model documentation before startup.