OEM Carrier Pressure Switch with Bracket HK06WC090 for Model PG8UAA042091ACJA

This is the factory OEM replacement pressure switch with bracket for the Carrier PG8UAA042091ACJA packaged gas furnace. The pressure switch is a critical safety component that monitors the negative pressure (draft) created by the inducer motor. It proves that proper combustion airflow is established before allowing the ignition sequence to proceed. When this switch fails, the furnace will typically lock out before the igniter fires — leaving you with a blinking fault code, a non-responsive call for heat, or a furnace that starts the inducer but never progresses to ignition.

• Specs: OEM-rated water column (W.C.) set point factory-matched to Carrier PG8UAA042091ACJA | Includes factory mounting bracket for direct drop-in installation | Single-port design | 24V control circuit compatible
• OEM vs Generic: This is a genuine Carrier OEM part (HK06WC090), calibrated to the exact W.C. set point required by your furnace. Aftermarket pressure switches frequently carry wider tolerances that can cause nuisance lockouts or — more dangerously — fail to detect a true blocked flue condition.
• Install difficulty: 3/5 — Requires disconnecting the inducer hose(s), wiring harness, and removing the bracket screws. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter (to verify open/closed operation). Always cycle power off at the breaker and gas off at the shutoff valve before servicing.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier PG8UAA042091ACJA packaged gas furnace unit. Always cross-reference the W.C. rating printed on your existing switch label against part number HK06WC090 before installation. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us anytime.