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and inducer motors in high-demand environments
depending on local particulate levels
PF 1501) and Knight series units including AWN151PM
the 621721 is the official direct replacement motor for the 621721R and 6217210 models
Bard HVAC 8408-039BX Stat 320735-701 and inducer motors in high-demandThe Bard HVAC 8408 039BX Stat is a high precision L250 50F discharge line thermostat engineered for heavy duty commercial and wall mount equipment. As the direct replacement for 8408 039, this OEM component is critical for monitoring compressor discharge temperatures to prevent high head pressure events and thermal overload. Designed with a specific L250 50F setpoint, the switch opens at 250F and automatically resets at 200F (50F differential),