The Pressure Switch (SKU X-3400-9) is a critical OEM replacement component designed specifically for the XPOWER X-3400 Air Scrubber. This switch monitors internal air pressure as part of the unit’s built-in differential-pressure sensor system, triggering the red Filter Change / Alarm Light when the airflow drops due to a loaded or blocked filter. 

Over time, the original pressure switch can wear out, malfunction, or fail to respond - which compromises the scrubber’s ability to warn users when filters are overly saturated. Replacing it with a genuine part restores accurate pressure sensing so that filter maintenance notifications remain reliable, ensuring the X-3400 operates safely and efficiently.