773-403

This high-performance Liquid Propane Carrier Pressure Switch is a vital safety component for residential gas furnaces. As an essential air proving switch, it is designed to monitor the negative pressure generated by the draft inducer motor, ensuring that exhaust gases are properly vented before the ignition sequence begins. If the switch detects a venting obstruction or a failure in the inducer fan, it will automatically interrupt the heating cycle to prevent hazardous conditions. This replacement part is a common solution for furnaces experiencing ignition failure, frequent cycling, or specific pressure switch-related error codes. Engineered for durability and precise calibration, this switch is specifically optimized for use in liquid propane (LP) heating applications, providing reliable operation and peace of mind during the coldest months.
Type: Air Pressure Switch
Size: Small
Application: Forced-air furnaces and HVAC heating systems configured for liquid propane (LP). Used to prove draft airflow and ensure safe exhaust ventilation.
Specifications: Single-pole pressure sensing; integrated diaphragm for precise air proving; specifically calibrated for LP furnace pressure requirements.