OEM Carrier Pressure Switch with Bracket -0.33 WC for Model PG8UAA036065ADJA

This is the factory OEM replacement pressure switch for the Carrier PG8UAA036065ADJA packaged gas furnace. The pressure switch is a critical safety component that monitors the negative pressure (draft) created by the inducer motor at startup. When the inducer motor spins up and establishes proper venting, the pressure switch closes and signals the control board to proceed with ignition. If the switch fails or reads the wrong pressure, the furnace locks out before the burners ever fire — a common symptom being repeated ignition attempts with no heat output and a pressure switch fault code on the control board.

• Specs: -0.33 W.C. (inches of water column) set point | Includes factory bracket for direct bolt-in installation | Single-port hose fitting | Compatible with 24V control circuit
• OEM vs Generic: This is a genuine Carrier OEM part (HK06WC090) manufactured to exact factory tolerances. Generic pressure switches often have imprecise W.C. ratings that cause nuisance lockouts or, worse, allow unsafe venting conditions. OEM is the only recommended choice for safety-critical components.
• Install Difficulty: 2/5 — Straightforward swap for experienced DIYers. Tools needed: #2 Phillips screwdriver, 1/4" nut driver, needle-nose pliers. Turn off gas and power before servicing. Disconnect the rubber hose from the inducer port, unplug the wire harness, unbolt the old bracket, and reverse to install. Always check hose and port for cracks or blockage before replacing the switch.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier PG8UAA036065ADJA packaged gas furnace units. Part number HK06WC090 also supersedes earlier part numbers including HK06WC088, HK06WC086, HK06WC076, HK06WC072, HK06WC073, and HK06WC074. Verify the W.C. rating on your existing switch before ordering if your model is not listed. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.