once the temperature drops below the 35°F differential

The intake holes must face directly into the airflow

meaning they can be used interchangeably in the field

or air trapped in the heat exchanger

Specifications:

York S1-024-35267-000 Pressure Switch Els PW 17895 once the temperature drops belowThe York S1 024 35267 000 Pressure Switch is a critical combustion safety component designed for precise monitoring of furnace inducer blower performance. This SPNO pressure switch (Single Pole Normally Open) is engineered to close on a fall in pressure, ensuring the combustion air sequence is fully established before the ignition cycle begins. Rated with a trip point range of 0. 6 1. 05 WC, this genuine Johnson Controls HVAC part provides the exact