A 3-flash sequence typically indicates an ignition failure or flame sensing issue

Flexible Mounting: Integrated top bracket allows for direct panel mounting where DIN rail space is unavailable

ensuring the HVAC safety circuit remains closed only when adequate flow is detected

and required sealing components for a comprehensive field repair

OEM Quality Standards: Manufactured to the precise tolerances required for Parker Fluid Control equipment

Carrier HK02ZA275 Pressure Switch 321042-401 A 3-flash sequence typically indicatesAs a veteran tech, you know that a failing pressure switch quickly sidelines a commercial chiller or rooftop unit. The Carrier HK02ZA275 Pressure Switch is the OEM replacement part engineered specifically for high demand Carrier, Bryant, and Payne equipment. This factory authorized part ensures your system maintains its design specifications for safety and cycling. Whether you are servicing a 30HXA series chiller or a heavy tonnage rooftop, using this