the Reznor 140-220F auto limit opens the control circuit when temperatures exceed secondary limits and automatically restores the circuit once safe operating parameters are reached

Disconnect all power sources before handling

minimizing pressure spikes and ensuring quiet

particularly when used in potable water or pneumatic systems

Key Benefits for Contractors OEM Compatibility: Exact drop-in replacement for York

Carrier HK38EA012 Circuit Board 326010-701 the Reznor 140-220F auto limitThe Carrier HK38EA012 Circuit Board is a genuine OEM replacement fan control board designed for high performance Carrier, Bryant, and Payne air handlers and heat pump systems. Engineered to function as the primary logic controller, this HVAC control board manages critical timing sequences, fan motor speeds, and safety circuit monitoring to ensure efficient airflow. Its robust design is built to withstand the electrical demands of residential and light