OEM Carrier Pressure Switch with Bracket .33 WC for Model PG8DAA036070ADJA

This OEM pressure switch with bracket (part #HK06WC090) is the factory-specified replacement for the Carrier PG8DAA036070ADJA packaged gas furnace. The pressure switch is a safety device that monitors negative pressure created by the inducer (draft) motor to confirm proper venting before allowing the ignition sequence to proceed. When it fails or develops a leak, the furnace control board cannot verify safe combustion conditions and will lock out — typically resulting in a no-heat fault code pointing to a pressure switch open condition. The furnace may attempt to start, run the inducer briefly, and then shut down without ever reaching ignition.

• Specs: .33 W.C. (inches water column) rating | Includes factory bracket for direct bolt-in mounting | Single-port design | 24V control circuit
• OEM vs Generic: This is a genuine Carrier OEM part, factory-calibrated to the exact .33 W.C. set point required by the PG8DAA036070ADJA. Off-brand switches often carry wide pressure tolerances that can cause nuisance trips or, worse, allow the furnace to fire under unsafe draft conditions.
• Install difficulty: 2/5 — Tools needed: 1/4" nut driver, flat-head screwdriver, and a manometer (recommended to verify draft pressure post-install). Always shut off power and gas before servicing. Swap the hose and wiring connections one at a time to avoid mis-wiring.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day when placed by 5 PM EST.

Compatibility: Confirmed fit for Carrier model PG8DAA036070ADJA. This part also supersedes legacy Carrier/Bryant part numbers including HK06WC088, HK06WC086, HK06WC076, HK06WC074, HK06WC073, HK06WC072, HK660001, 326750-751, 310315-751, and 310315-752. Always verify your unit's W.C. rating on the data plate or wiring diagram before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy.