Carrier HH18HA506 Limit Switch 321894-709 and S90 series control modules

and S90 series control modules

With a 750 PSI upper limit

This high-pressure cutout switch operates with fixed setpoints

Key Benefits Universal Compatibility: Fits a wide array of Copeland semi-hermetic compressors including M

Carrier HH18HA506 Limit Switch 321894-709 and S90 series control modulesThe Carrier HH18HA506 Limit Switch serves as a critical safety component in high efficiency gas furnaces and air handlers, designed to interrupt the burner circuit if internal temperatures exceed the predefined safety threshold. This fixed temperature limit control features a manual reset mechanism, a vital requirement for specific furnace categories where a limit trip necessitates a physical inspection to diagnose airflow obstructions or heat