and HC680067 part numbers

this bimetal furnace switch manages both blower motor activation and safety high-limit cutouts

It is designed to sense air pressure

This Source 1 OEM replacement part is critical for technicians maintaining system stability and preventing liquid slugging in heavy-duty commercial units

Carrier LH33CZ003 Ignition Control 320735-701 and HC680067 part numbersThe Carrier LH33CZ003 Ignition Control is a critical OEM replacement component designed for precise sequence management in Carrier, Bryant, and Payne furnaces. As a veteran grade electronic ignition module, this part manages the interface between the thermostat and the burner assembly, overseeing the hot surface igniter (HSI), inducer motor, and gas valve operations. This DSI ignition control (Direct Spark Ignition) ensures safe and reliable furnace