This specific limit switch is calibrated to trip (open) at 200°F and will reset (close) once the sensing element reaches 60°F

Key Benefits OEM Precision: Guaranteed Trane SLG0032 compatibility ensures exact fitment on the motor shaft without the vibration issues common in universal alternatives

or a motor that hums but fails to start

As an HVACR professional

and T921 series thermostats

Carrier HH12ZB220 Limit Switch This specific limit switch isThe Carrier HH12ZB220 Limit Switch is a critical safety component designed for high limit protection in residential furnaces, packaged units, and air handlers. Engineered as a normally closed (NC) switch, this part initiates a system cutout when the 220F open temperature is reached, effectively preventing heat exchanger damage and hazardous operating conditions. Once the plenum cools to the 180F close temperature, the bimetal disc automatically