Carrier HH680109 Rollout Switch 318973-401 Common indicators include intermittent ignition

Common indicators include intermittent ignition failure

This HVAC expansion valve features a precise 1/2 x 7/8 inch connection configuration

you must still install a high-capacity burnout filter drier to capture particulates and moisture

This remote bulb temperature control features a Single Pole Double Throw (SPDT) switch configuration

this unit is optimized for R-134a refrigerant

Carrier HH680109 Rollout Switch 318973-401 Common indicators include intermittent ignitionThe Carrier HH680109 Rollout Switch is a critical safety component designed for furnace combustion chambers, specifically engineered to detect sustained flame rollout conditions. This 190F manual reset rollout switch features a single pole double throw (SPDT) configuration, providing reliable circuit interruption and signaling for modern HVAC control boards. As a direct OEM replacement for HH22HA189, it ensures precise thermal calibration for Carrier,