121-210

This premium Air Pressure Switch with Bracket is an essential safety and functional component for HVAC systems, including residential furnaces and air handlers. Commonly referred to as an air proving switch, its primary function is to monitor the pressure differential created by the draft inducer or blower motor. By ensuring that proper airflow is established before allowing the heating or cooling sequence to begin, this switch prevents hazardous operation and system inefficiencies. If your HVAC unit is failing to ignite or experiences frequent cycle interruptions, a malfunctioning pressure sensor may be the cause. This replacement part includes a pre-attached mounting bracket for a secure, stable installation and is built with high-quality materials to ensure long-lasting performance in demanding environments.
Type: Air Pressure Switch / Air Proving Switch
Size: Small
Application: Used in HVAC equipment such as gas furnaces, air handlers, and central air conditioning units to verify proper airflow and inducer motor operation.
Specifications: Features an integrated mounting bracket, diaphragm-actuated sensing mechanism, and standard electrical terminals for seamless integration into existing control circuits.