OEM Carrier Pressure Switch w/ Bracket .33 WC for Model PG8UAA024045AAJA (HK06WC090)

This is the factory OEM replacement pressure switch with bracket for the Carrier PG8UAA024045AAJA gas furnace. The pressure switch monitors the negative pressure (draft) created by the inducer motor to confirm that the flue is drawing properly before allowing the ignition sequence to proceed. If this switch fails or sticks open, the furnace control board will lock out the heating cycle — often before you ever hear a spark or see a glow. Common symptoms include a furnace that begins the inducer start but never advances to ignition, a blinking fault code for "pressure switch open," or a unit that attempts ignition and immediately shuts down.

• Specs: .33" W.C. (inches water column) rated | Includes factory mounting bracket | Single-port design | 24V control circuit compatible | OEM part number HK06WC090
• OEM vs Generic: This is a genuine Carrier OEM part — factory-calibrated to exactly .33" W.C. trip point. Generic aftermarket switches often carry ±10–15% tolerance, which can cause nuisance lockouts or, worse, allow ignition under unsafe draft conditions. OEM is the only safe choice for a gas appliance.
• Install difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, needle-nose pliers. Remove the hose from the inducer port, unplug the 2-wire harness, unmount the old bracket, and reverse to install. Always verify hose for cracks or blockage before condemning the switch.
• Warranty: 1-year OEM manufacturer warranty from date of purchase. In-stock orders ship same business day when placed by 5 PM local time.

Compatibility: Engineered for Carrier model PG8UAA024045AAJA gas furnace. Also supersedes legacy part numbers HK06WC088, HK06WC086, HK660001, HK06WC076, HK06WC072, HK06WC073, and HK06WC074 — making this a wide-coverage OEM replacement. Verify the .33" W.C. rating on your existing switch before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before your order ships.