Common Questions Is the 27F74 compatible with the 27F7401

cause pressure switch failures

The York S1-026-34028-001 Limit Switch is a critical furnace safety control designed to protect HVAC systems from high-temperature excursions

In heavy-duty HVAC applications

ensuring OEM-spec performance and terminal alignment during service calls

Nordyne 632443R Pressure Switch Common Questions Is the 27F74The Nordyne 632443R is a critical OEM replacement pressure switch designed for induced draft furnaces. Engineered to monitor the differential pressure between the draft inducer motor and the flue, this SPST (Single Pole Single Throw) switch is factory calibrated to a precise 0. 85" WC (Water Column) trip point. It features a 1 4" barbed connection for standard pneumatic tubing and two terminal electrical contacts for direct furnace control board