Genuine OEM Viking Downdraft Vent Fan PCB Control Relay Board, part number PV300121. This electronic control relay board is designed specifically for Viking ventilation systems and range hoods, managing fan speeds and operational commands to restore your kitchen airflow system to factory performance. This part is compatible with multiple premium Viking gas cooktops, including (but not limited to) the following series. VIPR Series: VIPR101, VIPR161, VIPR181, VIPR161RSS. DIPR Series: DIPR100, DIPR150, DIPR160. Interchangeable Part Numbers: AP5318161, 9701551. ? Fitment Note: Please check your appliance model tag and/or send us a message before purchasing to confirm compatibility.