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This is the genuine OEM Carrier pressure switch assembly with mounting bracket, part number HK06WC069, factory-specified for the Carrier PG8MAA066110ACJA gas furnace. The pressure switch is a critical safety component that monitors negative pressure created by the inducer draft motor. Once the inducer reaches the correct speed and airflow, the switch closes to signal the control board that it is safe to proceed with ignition. When this switch fails, the furnace will lock out before ignition — resulting in a no-heat call with a typical fault code indicating a pressure switch open or inducer failure.
Compatibility: Designed for the Carrier PG8MAA066110ACJA 80% AFUE gas furnace. Always verify your existing switch's W.C. rating from the data label before ordering. Before replacing the switch, inspect the rubber hose port and tubing for cracks, blockages, or condensate — these are the most common causes of false pressure switch faults. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us today and we'll ship your part the same business day.