Carrier HH12ZZ190 Limit Switch R-22 though upright is preferred to

though upright is preferred to prevent sediment buildup

Automatic Reset Logic: Eliminates manual resets by closing the circuit once temperatures drop back to safe operating levels

High Output Performance: Provides a steady 750 millivolt signal to effectively power independent gas control circuits without external electricity

OEM Precision: Genuine part ensures exact fitment and terminal alignment for faster installation

Rugged Construction: Features a corrosion-resistant bronze body and seat for long-term service life in harsh mechanical rooms

Carrier HH12ZZ190 Limit Switch R-22 though upright is preferred toThe Carrier HH12ZZ190 Limit Switch is a critical safety component designed for precise thermal monitoring in residential gas furnaces. Engineered as a normally closed (NC) high limit control, this genuine OEM replacement part features a 190F fixed set point and a 40F differential. This means the circuit opens on a temperature rise at 190F to prevent heat exchanger damage and automatically resets when the temperature drops to 150F. Reliable thermal