OEM Carrier Pressure Switch with Bracket -0.33" W.C. for Model PG8UAA036111ACJA

This is the genuine OEM replacement pressure switch (part number HK06WC090) for the Carrier PG8UAA036111ACJA gas furnace. The pressure switch monitors negative pressure created by the inducer motor during the startup sequence, confirming that the flue is drafting safely before allowing the ignition sequence to proceed. When it fails or sticks open, the furnace control board receives no proof-of-draft signal and locks out — resulting in a no-heat call with the inducer running but no ignition. The included mounting bracket ensures a factory-correct, rattle-free installation.

• Specs: -0.33" W.C. (water column) set point | SPNO (single-pole, normally open) | Includes factory mounting bracket | OEM part number HK06WC090
• OEM vs Generic: This is a genuine Carrier OEM part — factory-calibrated to the exact -0.33" W.C. trip point required by the PG8UAA036111ACJA. Off-brand switches with loose tolerances can cause nuisance lockouts or, worse, fail to detect a blocked flue condition.
• Install difficulty: 2/5 — Turn off power and gas before starting. Disconnect the rubber hose from the inducer port and the two low-voltage wires (photograph first). Swap the bracket-mounted switch, reconnect hose and wires, restore power. Tools needed: 1/4" nut driver, needle-nose pliers. Check the hose and port for condensate blockage while the panel is open.
• Warranty: 1-year OEM factory warranty. In-stock — ships same business day from our warehouse.

Compatibility: Factory-specified replacement for Carrier model PG8UAA036111ACJA gas furnace. Also replaces superseded Carrier part numbers HK06WC088, HK06WC086, HK660001, HK06WC076, HK06WC072, HK06WC073, and HK06WC074. Verify the -0.33" W.C. rating on your existing switch before ordering. Our fitment team is available to confirm compatibility before you buy.