Utilizing a genuine Johnson Controls replacement part ensures that the spray pattern remains centered within the burner tube

This prevents the bulb from becoming stuck in the well

Failure is typically caused by over-torquing the head bolts or extreme water hammer events

Designed for use with non-corrosive gases like natural gas

Ensures consistent amperage delivery to the solenoid actuator for reliable valve cycling

Carrier HH12ZB200 Limit Switch Utilizing a genuine Johnson ControlsThe 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