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Lacquer sheets stacked — description and returns below the cascade board.
The York S1-031-03004-000 Defrost Control Board is a critical OEM replacement component engineered for precision management of defrost cycles in residential and commercial heat pump systems
Broad Operating Range: Supports a temperature span of -30°F to 90°F
Durable Construction: Features 7/8" ODF sweat connections for leak-resistant
Known for its reliability in R-410A systems
Nordyne 632547R Pressure Switch 318423-701 The York S1-031-03004-000 Defrost ControlThe Nordyne 632547R Pressure Switch is a critical OEM furnace safety control engineered to monitor proper inducer motor draft and venting conditions in high efficiency heating systems. This SPST (Single Pole, Single Throw) switch is factory calibrated to a precise 0. 90" WC (Water Column) set point, ensuring the combustion process only initiates when safe airflow thresholds are met. As a genuine Nordyne replacement part, it eliminates the calibration
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