OEM Carrier Pressure Switch with Bracket -0.33 WC for Model PG8DAA036095ADJA

This OEM pressure switch with mounting bracket (part# HK06WC090) is the factory-specified replacement for the Carrier PG8DAA036095ADJA gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm proper venting before allowing ignition to proceed. When it fails or sticks open, the furnace control board will lock out the heating sequence entirely — typically before the igniter ever glows — and may trigger a fault code for "pressure switch stuck open" or "inducer fault." Always verify the inducer motor and hose are functioning before replacing the switch.

• Specs: -0.33" W.C. (inches water column) set point | Includes factory mounting bracket | SPST normally open | Factory-matched switching tolerance for reliable inducer proving
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact W.C. rating specifications. Off-brand pressure switches frequently carry ±10–15% W.C. tolerances, causing nuisance lockouts or — worse — allowing unsafe venting conditions to go undetected.
• Install difficulty: 2/5 — Power down and confirm the inducer hose and port are clear before replacing. Tools needed: #2 Phillips screwdriver, 1/4" nut driver, and a manometer or magnehelic gauge to verify set point post-install. Photograph all hose and wire connections before disconnecting.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for Carrier model PG8DAA036095ADJA gas furnace. This part supersedes and replaces earlier Carrier pressure switch part numbers including HK06WC088, HK06WC086, HK06WC076, HK06WC074, HK06WC073, HK06WC072, HK660001, 326750-751, 310315-751, and 310315-752. Confirm the -0.33" W.C. rating on your unit's existing switch before ordering. Our team is available to verify fitment — contact us before you buy.