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The EMERSON R101432-13 Armstrong Air Pressure Switch is a factory-calibrated, OEM draft proving switch that ensures proper airflow within the furnace before ignition. Rated at 0.60 inches water column (WC), this pressure switch monitors that the inducer motor creates sufficient negative pressure before allowing the gas valve to open.
This pressure switch plays a critical role in your furnace's safety and startup sequence. A failed switch may prevent ignition and display error codes. It is brown-coded for quick visual identification.
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