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This is the genuine OEM pressure switch assembly with mounting bracket for the Carrier PG8MAA024045ADJA gas furnace. The pressure switch is a safety device that monitors negative pressure created by the inducer motor before allowing the ignition sequence to proceed. When the inducer proves adequate draft, the pressure switch closes and signals the control board to advance to ignition. A failed pressure switch causes the furnace to lock out before the burners ever fire — often accompanied by a diagnostic fault code indicating an open pressure switch or inducer fault.
Compatibility: Engineered specifically for the Carrier PG8MAA024045ADJA packaged gas furnace. Also cross-references with select Bryant and Payne models sharing the same pressure switch specification — verify your unit's W.C. rating on the data plate or existing switch before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork, no returns.