When diagnosing high-limit trips or poor airflow in a Forsaire electric furnace

also identified as 05

Why does this manual reset limit switch keep tripping on my boiler

This kit is specifically designed for Schneider Electric and Barber Colman 2x2 inch pneumatic thermostats

Carrier HH12ZZ165 Limit Switch 319848-301 When diagnosing high-limit trips orThe Carrier HH12ZZ165 Limit Switch is a critical OEM safety component engineered for precision thermal monitoring in HVAC furnaces and industrial heating systems. As a fixed temperature L165F 40 limit control, this switch features a normally closed (NC) circuit designed to open on a temperature rise at its 165F set point, effectively preventing heat exchanger damage. With a 40F differential, the automatic reset engages when the internal temperature