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

This kit is primarily designed for halocarbon refrigerants used in the Parker Flo-Con line

The robust ceramic base measures 1

ensuring OEM-spec performance and terminal alignment during service calls

"CO" stands for Cut-Out

Nordyne 632443R Pressure Switch The York S1-026-34028-001 Limit SwitchThe 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