This Bard indoor fan control board is a critical replacement component for commercial and industrial variable air volume (VAV) systems

provided the water heater model number matches the OEM part specification

it manages the combustion process with high-precision timing

The switch features a rugged construction capable of withstanding the vibration and thermal cycling common in condenser cabinets

Simplified Installation: The plug-in architecture allows for rapid swaps without the need for complex terminal re-mapping or custom mounting

Nordyne 626551 Ambient Sensor 321702-401 This Bard indoor fan controlThe Nordyne 626551 Outdoor Ambient Sensor is a critical OEM HVAC replacement part designed for precision temperature monitoring in residential and light commercial split systems. In the field, we rely on this thermistor to provide the outdoor ambient temperature data necessary for the control board to manage compressor staging, defrost cycles, and lock out setpoints. This HVAC temperature sensor is engineered as a direct fit component for Nordyne,