OEM Carrier Bryant Payne Furnace Air Pressure Switch Replaces 347015-706. This is a brand new OEM Carrier Bryant Payne upgraded Furnace Air Pressure Switch. It replaces the part numbers listed below. An air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely. Replaces Old Part #s. Partial List of Units that Use This Item. Hit Ctrl + F and enter your model number for a quick search!