As a critical motor starting relay

the 4200-002 is designed for 4-way mounting

Precision Airflow Management: Integrated minimum position adjustment allows for field-calibrated bypass air

the 46196601 is specifically calibrated for the 3-inch fan housing and shroud

Carrier HK42FZ039 Control Board R-134A As a critical motor startingThe Carrier HK42FZ039 Control Board is a critical OEM replacement circuit board engineered for high performance management of residential HVAC furnace and air handler systems. This gas furnace control board serves as the central processing unit, regulating ignition sequences, blower motor speeds, and safety limit circuits. Built to genuine Carrier HVAC parts standards, the HK42FZ039 ensures precise timing for draft inducer motors and gas valve