The 4-bolt union connection allows for 360-degree diaphragm rotation

When troubleshooting vibration issues or reduced airflow in Reznor heaters

making it suitable for protected outdoor use

consistent with most 1

Carrier HH18HA282 Thermostat/Sensor 318423-701 The 4-bolt union connection allowsThe Carrier HH18HA282 is a high precision defrost thermostat sensor engineered for Carrier, Bryant, and Payne heat pump systems. This OEM replacement part, also identified by manufacturer number 3NT01L 04002, is a critical tube mount sensor designed to monitor evaporator coil temperatures. Operating on an L80 50 logic, the switch is calibrated to open at 80F and close at 30F, ensuring the defrost cycle triggers only when frost accumulation threatens