773-240

The Rheem Air Pressure Switch is a vital safety component for modern gas furnaces and heating systems. This air-proving switch monitors the combustion blower's performance to ensure exhaust gases are properly vented before the ignition sequence begins. Designed to detect specific vacuum pressure differentials, it acts as a fail-safe that prevents ignition or shuts down the burner if it senses restricted airflow, a blocked vent, or a failing inducer motor. This replacement part is essential for maintaining the safe and efficient operation of residential HVAC units, helping to troubleshoot heating cycles that fail to start. Built for reliability, this switch ensures that your heating system maintains proper combustion air levels for consistent home comfort.
Type: Air Pressure Switch
Size: Compact
Application: Used in gas-fired furnaces and HVAC air handlers to verify proper inducer motor operation and venting safety.
Specifications: Set point: -0.50" WC; Reset point: -0.40" WC; Function: Air proving and safety interlocking.