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those part numbers are identical internal designations for the same 120V N/C actuator used in International Environmental equipment
Technicians should de-energize the system and use a multimeter to check for a normally open state across the contacts
wall-mounted indirect fired heating control designed for commercial and light industrial space heating applications
Factory-set at 50 PSI
The cable plug or socket is typically sold separately to allow for specific wiring configurations
Carrier HK61EA010 Circuit Board 321894-706 those part numbers are identicalThe Carrier HK61EA010 Circuit Board is a critical OEM replacement part designed for precise regulation of fan blower operations in Carrier, Bryant, and Payne air handlers and furnaces. As the primary control interface, this HVAC furnace control board (MPN: HK61EA010) coordinates high voltage signals to the blower motor and monitors system safety switches to maintain optimal airflow. Engineered for compatibility with the PF4MNA and FEM4X series, it