Carrier HK02ZA404 Pressure Switch 319848-301 Always calculate total VA draw

Always calculate total VA draw when multiple actuators are wired to a single transformer to ensure stable proportional control

maintaining furnace burner assembly integrity over extended service intervals

critical for preventing compressor slugging and maintaining system stability

If the control board displays a sensor failure code

Designed with a 3/4" NPT connection

Carrier HK02ZA404 Pressure Switch 319848-301 Always calculate total VA drawThe Carrier HK02ZA404 is a vital OEM high pressure switch designed specifically for Carrier, Bryant, and Payne HVAC and refrigeration systems. This factory authorized part is engineered to safeguard the compressor and refrigeration cycle by monitoring internal pressures and opening the electrical circuit when limits are reached. The switch features a 650 PSI cutout and a 420 PSI cut in reset point, ensuring the system operates within safe mechanical