OEM Carrier Pressure Switch with Bracket -0.33" W.C. for Model PG8DAA048115ADJA

This is the factory OEM pressure switch with mounting bracket for the Carrier PG8DAA048115ADJA packaged gas furnace. The pressure switch is a normally open safety device that monitors negative pressure generated by the inducer motor, proving that the flue is clear and the draft is established before allowing ignition. When this switch fails — or the inducer, hose, or port is compromised — the control board receives no signal to proceed, resulting in a no-heat lockout. Common symptoms include: furnace attempts to start, inducer runs, but ignition never initiates; repeated short-cycle lockouts; or fault codes indicating a pressure switch fault on the control board.

• Specs: Rating: -0.33" W.C. (water column) | Type: SPST, normally open | Includes factory mounting bracket | OEM Part Number: HK06WC090
• OEM vs Generic: This OEM unit is calibrated to factory-exact setpoint tolerances. Generic pressure switches frequently drift outside the rated W.C. range, causing nuisance lockouts or — worse — failing to trip when a true draft fault is present, creating a safety hazard.
• Install Difficulty: 2/5 — Straightforward swap accessible from the furnace cabinet. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, and a vacuum/pressure manometer (recommended for post-install verification). Always inspect the rubber hose and inducer port for cracks, blockages, or condensation before replacing the switch.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered before cutoff. Replaces legacy part numbers including HK06WC088, HK06WC086, HK06WC076, HK06WC072, HK06WC073, HK06WC074, HK660001, 326750-751, 310315-751, and 310315-752.

Compatibility: Engineered as the direct OEM replacement for Carrier model PG8DAA048115ADJA packaged gas furnace units. Verify the -0.33" W.C. rating on your existing switch label before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us before placing your order.