OEM Carrier Pressure Switch with Bracket (.33 W.C.) for Model PG8UAA036045AAJA

This is the genuine OEM Carrier pressure switch with bracket (part #HK06WC090) — the factory-specified replacement for the Carrier PG8UAA036045AAJA packaged gas unit. The pressure switch monitors negative pressure created by the inducer motor to confirm safe venting conditions before the control board allows ignition to proceed. When this switch fails or drifts out of spec, the furnace will lock out before ignition, leaving you with a flashing fault code and no heat.

• Specs: .33" W.C. (water column) set point | Includes factory mounting bracket | Direct OEM replacement | Spade terminal connections | Compatible with single-stage inducer circuit
• OEM vs Generic: This is a genuine Carrier OEM part, factory-calibrated to the exact .33" W.C. set point required for the PG8UAA036045AAJA. Off-brand switches often carry ±15% pressure tolerances that cause nuisance lockouts or — worse — allow ignition under unsafe venting conditions.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a short length of replacement tubing if the hose is cracked. Disconnect the rubber hose and two wire leads, unmount the old bracket, and reverse to install. Always clear any condensate blockage from the hose before replacing the switch.
• Warranty: 1-year OEM factory warranty. Orders ship same business day from our stocked warehouse.

Compatibility: Engineered as a direct fit for Carrier model PG8UAA036045AAJA packaged gas units. Also supersedes legacy part numbers HK06WC088, HK06WC086, HK06WC076, HK06WC072, HK06WC073, HK06WC074, HK660001, 326750-751, 310315-751, and 310315-752 — verify your existing switch's W.C. rating on the data plate before ordering. In stock and ready to ship — order by 3 PM local time for same-day dispatch.