Carrier HH12ZB200 Limit Switch this brass burner orifice ensures

this brass burner orifice ensures the correct air-to-fuel ratio demanded by high-efficiency heating systems

This specific L165-30 furnace limit switch is calibrated to open at 165°F (shuting down the burner) and close at 135°F (resuming operation once temperatures stabilize)

The component features a high-grade bimetal sensor and standard terminal spade connectors for a secure

making it an ideal upgrade for 370V systems

acting as a critical failsafe by detecting flame rollout or excessive heat buildup near the burner assembly

Carrier HH12ZB200 Limit Switch this brass burner orifice ensuresThe Carrier HH12ZB200 Limit Switch is a critical OEM replacement part engineered for precise thermal protection in residential and light commercial furnaces. This auto reset limit switch features a 3 inch insertion depth and is factory calibrated for an L200 40 configuration, meaning it opens on a temperature rise at 200F and automatically closes once the system cools to 160F. As a furnace high limit thermostat, it prevents internal heat exchanger