OEM Carrier Pressure Switch w/ Bracket .33 WC for Model PG8UAA048111ACJA

This is the factory OEM pressure switch with integrated mounting bracket for the Carrier PG8UAA048111ACJA gas furnace. The pressure switch is a critical safety component that monitors negative pressure created by the inducer draft motor. If the correct pressure is not detected — confirming proper venting and inducer operation — the pressure switch prevents the ignition sequence from proceeding, protecting your home from dangerous flue gas conditions. A failed pressure switch most commonly causes a no-heat lockout: the inducer motor spins up, but the furnace never advances to ignition, often triggering a fault code on the control board. Before condemning the switch, always inspect the hose, port, and drain lines for blockages or moisture, which can mimic a failed switch.

• Specs: Rating — .33 WC (inches of water column) | Type — SPST | Includes factory mounting bracket | OEM part number HK06WC090 | Replaces: HK06WC088, HK06WC086, HK06WC076, HK06WC072, HK06WC073, HK06WC074, HK660001, 310315-751, 310315-752, 326750-751
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory pressure-trip specifications. Aftermarket pressure switches frequently carry ±5–10% trip-point variance, which can cause nuisance lockouts or, worse, allow the furnace to operate without confirmed draft — a serious safety risk.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Disconnect the vacuum hose and two low-voltage wires from the old switch, swap the bracket, and reconnect. Tools needed: flathead and Phillips screwdriver, needle-nose pliers. Test with a manometer if symptoms persist after replacement.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day when placed by 5 PM local time.

Compatibility: Engineered for the Carrier PG8UAA048111ACJA gas furnace. Verify your unit's existing pressure switch WC rating on the data plate or switch label before ordering. If you have any fitment questions, our HVAC parts specialists are available to confirm compatibility before you buy — order with confidence from NationalHVACParts.com.