Sealed Bearings: Features permanently lubricated ball bearings for quiet operation and a longer service life in high-temperature applications

The 7-inch insert length is specific to the unit's airflow pattern

While the default rotation is 90 degrees

If the fan side drops below tolerance

Carrier HH11AZ200 Vent Switch 340155-7024 Sealed Bearings: Features permanently lubricatedThe Carrier HH11AZ200 Vent Switch is a critical OEM replacement safety component designed to monitor airflow and temperature within the burner box of select Carrier, Bryant, and Payne furnaces. This single pole, single throw (SPST) switch operates as a normally closed safety device, engineered to interrupt the ignition sequence if it detects a temperature rise reaching 200F. Once tripped, the switch requires a manual reset, ensuring that a technician