OEM Carrier Pressure Switch w/ Bracket HK06WC090 for Model PG8UAA036111ADJA

This is the genuine OEM replacement pressure switch (part number HK06WC090) for the Carrier PG8UAA036111ADJA packaged gas furnace. The pressure switch monitors negative pressure created by the inducer blower to verify that proper draft is established before allowing the ignition sequence to proceed. When this switch fails or sticks open, the control board cannot confirm inducer operation and will lock out the furnace — resulting in a no-heat call with no spark, no ignition, and often a diagnostic fault code pointing to the pressure circuit.

• Specs: Rated at .33" W.C. (inches water column) | Includes factory-matched mounting bracket | Single-port diaphragm switch | SPST normally-open configuration | Direct OEM factory replacement
• OEM vs Generic: This factory-original switch is calibrated to the exact .33" W.C. trip point required by the PG8UAA036111ADJA control board. Generic aftermarket switches often carry ±10–15% tolerance on the setpoint, risking nuisance lockouts or, worse, missed inducer failures.
• Install difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, needle-nose pliers. Disconnect the rubber hose, unplug the wire harness, unmount the bracket, and reverse for installation. Always inspect the hose for cracks or blockages before fitting the new switch.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as a direct fit for the Carrier PG8UAA036111ADJA packaged gas furnace and related PG8UAA/PG8DAA series models. Also supersedes legacy part numbers HK06WC088, HK06WC086, HK06WC076, HK06WC074, HK06WC073, HK06WC072, HK660001, 326750-751, 310315-751, and 310315-752. Verify your unit's data plate W.C. rating before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy.