the 1186788 is the direct manufacturer-recommended superseding part for the 1171780 rectifier board

The heat-treated steel construction is designed to manage the specific torque levels necessary for opening front-seated or back-seated valves that have become stuck over time due to debris or oxidation

Its primary function is to regulate gas flow to the pilot burner

Specifically calibrated to 275 degrees F for high-tolerance flame rollout protection

Use a multimeter to check for continuity across the terminals when the system is cool

Carrier HH18HZ195 Rollout Switch the 1186788 is the directThe Carrier HH18HZ195 Rollout Switch is a critical safety component designed for Carrier furnace flame rollout protection. This OEM furnace safety switch features a Single Pole Single Throw (SPST) configuration with an automatic reset function, ensuring the system remains operational once safe temperatures are restored. Engineering specifications dictate a precise 195F open point to interrupt the heating cycle during abnormal combustion conditions,