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This OEM Carrier gas pressure switch is the factory-specified replacement for the Carrier PG8JAA024045AFJA packaged gas unit. The pressure switch is a critical safety component that monitors the inducer motor's draft pressure — it must confirm the inducer is running at proper speed and generating adequate vacuum before allowing the gas valve to open and ignition to proceed. When this switch fails, the furnace will typically go into lockout immediately after the inducer starts, displaying a pressure switch fault code, or will repeatedly attempt ignition and shut down without producing heat.
Compatibility: Engineered as a direct OEM replacement for Carrier PG8JAA024045AFJA packaged gas units. Also fits select Bryant and Payne models that originally specified HK02LB008 or HK06WC091 — verify your unit's data plate and wiring diagram W.C. rating before ordering. Questions about fitment? Our HVAC parts team confirms compatibility before you buy.