Lochinvar & A.O. Smith 100111064 Air Switch 320788-704 if the internal baffles are

if the internal baffles are restricted or if an air leak is preventing the induced-draft motor from closing the pressure switch

For technicians servicing refrigeration racks or process cooling loops

This OEM Reznor part is manufactured to exact tolerances

It requires the airflow from the fan blade it is driving to maintain proper operating temperatures and prevent thermal tripping

provided the mounting bolt pattern matches your specific bracket

Lochinvar & A.O. Smith 100111064 Air Switch 320788-704 if the internal baffles areThe Lochinvar & A. O. Smith 100111064 Air Switch is a critical safety component designed for precise pressure sensing in high efficiency boilers and water heaters. Engineered with a 6. 0" WC to 5. 0" WC set point, this differential pressure switch ensures the combustion blower is moving sufficient air before allowing the ignition sequence to proceed. As a genuine OEM replacement part, it maintains the precise calibration required to prevent nuisance