OEM Carrier Pressure Switch for Model GA2AAD036070AAJA (HK06WC085 / HK06WC097)

This is the factory OEM replacement pressure switch for the Carrier GA2AAD036070AAJA packaged gas/electric unit. The pressure switch monitors negative air pressure created by the draft inducer motor to confirm adequate venting before allowing ignition to proceed. When this switch fails or sticks open, the furnace control board cannot verify safe flue conditions and will lock out before the igniter ever fires — leaving you with no heat. Common symptoms include the inducer motor running but the igniter never glowing, a pressure switch fault code on the control board, or repeated ignition lockout with no other apparent cause.

• Specs: Replaces OEM part numbers HK06WC085 (standard) and HK06WC097 (with mounting bracket) | Factory-matched W.C. (water column) rating | Single-port pressure switch | 24V control circuit compatible
• OEM vs Generic: OEM pressure switches are calibrated to the exact water-column rating specified for this unit. Aftermarket substitutes frequently carry wider actuation tolerances, risking nuisance trips or — more dangerously — failure to detect a true venting fault. Always use OEM for safety-critical components like pressure switches.
• Install difficulty: 3/5 — Shut off gas and power before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, manometer (to verify W.C. rating), and multimeter to confirm continuity across switch terminals. Inspect rubber hose for cracks before reusing. Photograph all hose and wiring connections before removal.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier GA2AAD036070AAJA packaged gas/electric unit. Two OEM part numbers cover this application: HK06WC085 is the standard pressure switch, while HK06WC097 includes the factory mounting bracket — select the option that matches your existing configuration. Verify your unit's data plate and existing switch part number before ordering. Not sure which variant you need? Our HVAC parts specialists confirm fitment before your order ships.