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

This prevents the bulb from becoming stuck in the well

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

Featuring a distinct red housing for quick field identification

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

Carrier HH12ZB200 Limit Switch Ensures consistent amperage delivery toThe 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