the "/U" suffix denotes a "Universal" trade-packaged version often used for field replacement

Tripping is typically caused by a blocked chimney

Contributes to maintaining low operational noise in HVACR units

This OEM Slant Fin replacement part is calibrated to a fixed

Carrier HK02ZA413 Pressure Switch 328140-751 the "/U" suffix denotes aThe Carrier HK02ZA413 Pressure Switch is a critical high pressure safety cutout designed for use in specialized Carrier, Bryant, and Carlyle HVAC systems. This high pressure switch is factory calibrated to a 610 PSI cut out and a 420 PSI cut in, ensuring precise mechanical monitoring of the refrigerant circuit. Engineered with a robust SPST configuration, this HVAC pressure switch protects compressors from catastrophic failure due to over