The HTP 7855P-262 Air Pressure Switch is a precision HVAC safety component designed to monitor air pressure and help ensure proper system operation. It works by sensing changes in air pressure and activating or deactivating an electrical circuit when a preset pressure level is reached. This switch is commonly used in HVAC equipment such as boilers, furnaces, and combustion systems. It... https://www.partshnc.com/htp-7855p-262-air-pressure-switch