OEM Carrier Pressure Switch with Bracket -0.33" W.C. for Model PG8DAA036050ACJA

This OEM pressure switch with bracket (part #HK06WC090) is the factory-specified replacement for the Carrier PG8DAA036050ACJA gas furnace. The pressure switch monitors the negative pressure created by the inducer draft motor to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails or sticks open, the furnace control board detects the fault, halts the heating cycle, and locks out — leaving you with a cold home and a flashing fault code indicating a pressure switch error.

• Specs: -0.33" W.C. (water column) set point | SPST (Single Pole, Single Throw) | Includes factory mounting bracket | Direct OEM replacement for Carrier PG8DAA036050ACJA
• OEM vs Generic: This factory OEM switch is calibrated to the exact -0.33" W.C. set point required by your furnace. Generic switches often carry wider pressure tolerances, risking nuisance lockouts or — more dangerously — failure to detect a true venting fault.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, manometer (recommended for verification). Always inspect the rubber hose connecting the switch to the inducer for cracks or blockages before replacing the switch itself.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PG8DAA036050ACJA gas furnace. This part also supersedes earlier Carrier pressure switch part numbers including HK06WC088, HK06WC086, HK06WC076, and HK06WC072. Verify your existing switch's W.C. rating on the data plate or switch label before ordering. Our fitment team is available to confirm compatibility prior to purchase.