Carrier HH19ZA145 Limit Switch 319852-301 While some defrost sensors share

While some defrost sensors share similar footprints

For specialized Nordyne HVAC equipment

This 1" NPT unit features a single pole

The mechanical construction features a robust dial shaft and rugged housing

Carrier HH19ZA145 Limit Switch 319852-301 While some defrost sensors shareThe Carrier HH19ZA145 Limit Switch is a critical safety component designed for precise thermal monitoring in HVAC furnace systems and packaged units. As a high performance OEM replacement limit switch, this disc style sensor features a normally closed circuit that provides essential protection against heat exchanger overheating. Engineered to open at 145F and close at 105F, this automatic reset limit switch ensures your heating equipment stays within