OEM Carrier Pressure Switch for Model GA1AAD048070AAJA — HK06WC085 / HK06WC097

This is the factory OEM replacement pressure switch for the Carrier GA1AAD048070AAJA packaged gas/electric unit. The pressure switch monitors inducer motor operation by sensing negative air pressure in the vent and combustion air system. When the inducer proves adequate airflow, the switch closes and signals the control board to proceed with ignition. A failed pressure switch typically causes the system to lock out before any ignition attempt — the inducer runs, but the furnace never advances to the heat cycle. Fault codes pointing to pressure switch failure include a stuck-open or stuck-closed switch reading on the control board.

• Specs: OEM-rated W.C. (water column) pressure setting factory-matched to GA1AAD048070AAJA | Two available variants: HK06WC085 (standard pressure switch) and HK06WC097 (pressure switch with mounting bracket) — select the variant that matches your existing configuration
• OEM vs Generic: OEM pressure switches are calibrated to the exact W.C. rating required by your inducer and heat exchanger design. Generic substitutes frequently carry wider tolerances that can cause nuisance lockouts or, more dangerously, allow operation under marginal draft conditions.
• Install difficulty: 2/5 — Disconnect power before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, manometer (recommended for verification). Photograph all hose and wiring connections before removal. The HK06WC097 bracket variant simplifies remounting in units where the original bracket is damaged or missing.
• Warranty: 1-year OEM factory warranty on both part numbers. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier GA1AAD048070AAJA packaged unit. OEM part numbers HK06WC085 and HK06WC097 are direct replacements — choose HK06WC097 if your application requires the integrated mounting bracket. Always cross-reference the W.C. rating printed on your existing switch before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — in stock and ready to ship today.