2 Cv rating and 1/2" NPT connection points for a drop-in fit

3 Amps at 3/4 HP

If the internal line break opens

Technician-Friendly Design: Integrated 1/8-27 NPT pilot tap simplifies troubleshooting and pressure checks

Built for high-cycle industrial and commercial environments

Carrier HK42FZ040 Circuit Board 320735-701 2 Cv rating and 1/2"The Carrier HK42FZ040 furnace control board serves as a critical integrated furnace control (IFC) for high efficiency HVAC systems, acting as the direct functional replacement for the discontinued HK42FZ028 circuit board. Designed to manage the ignition sequence, inducer motor speed, and blower motor timing, this OEM Carrier replacement part ensures precise modulation of furnace gas valves and flame sensing safety circuits. Technicians will find the