Durable Construction: Heavy-gauge steel components withstand high cycling loads and environmental stressors within air handling units

The rugged construction resists corrosion typical in mechanical rooms and outdoor enclosures

Canadian installations must use the equivalent Canadian-certified conversion kit to comply with CAN/CGA-B149 codes

Its manual reset capability is a vital diagnostic feature for technicians

This specific model is a normally closed switch that triggers an open circuit on temperature rise at 160°F and closes upon a temperature drop to 120°F

Carrier HH12HA142 Limit Switch R-22 Durable Construction: Heavy-gauge steel componentsThe Carrier HH12HA142 is a genuine OEM limit switch engineered for precision thermal protection in residential and commercial gas furnaces. This manual reset limit switch is factory calibrated to trigger at a fixed temperature of 140F (60C), functioning as a critical safety cut off that interrupts the heating circuit upon detecting an over temperature condition. Constructed for high cycle reliability in harsh furnace environments, the HH12HA142