Carrier HH18HA440 Limit Switch R-22 Key Benefits: System Protection: Critical

Key Benefits: System Protection: Critical for the compressor lockout sequence

this low voltage zone valve actuator offers the fast response required for modern hydronic heating systems

providing essential compressor protection against over-pressurization caused by issues like restricted airflow or dirty condenser coils

and atmospheric heating systems

When exhaust temperatures exceed safety thresholds

Carrier HH18HA440 Limit Switch R-22 Key Benefits: System Protection: CriticalThe Carrier HH18HA440 is a high performance Auto Limit Switch designed for precise thermal protection in residential and light commercial HVAC equipment. Built for high reliability applications, this OEM Carrier part functions as a critical safety component by monitoring internal plenum temperatures. It is engineered with a set 140 degree Fahrenheit open temperature and a 100 degree Fahrenheit close temperature, ensuring your system initiates a safety