OEM Carrier Pressure Switch HK06WC085 / HK06WC097 for Model GA1AAD048100AAJA

This is the factory OEM replacement pressure switch for the Carrier GA1AAD048100AAJA packaged gas/electric unit. The pressure switch is a critical safety component that monitors negative air pressure created by the inducer motor before allowing the ignition sequence to proceed. When the switch fails — or when the sensing hose, port, or inducer is compromised — the control board reads an open pressure switch circuit and locks out the system, resulting in no heat and a diagnostic fault code. Common symptoms include a furnace or packaged unit that powers on, runs the inducer, but never advances to ignition.

• Specs: OEM Part Numbers HK06WC085 (standard) and HK06WC097 (with mounting bracket) | W.C. (water column) rating factory-matched to GA1AAD048100AAJA inducer specifications | SPNO (single-pole, normally open) configuration | Direct OEM replacement — no field modification required
• OEM vs Generic: OEM pressure switches are calibrated to the exact water-column trip point for this unit. Aftermarket switches frequently carry wider tolerance ratings, which can result in nuisance lockouts or, more dangerously, failure to detect true inducer faults — a safety risk. Choose OEM for reliability and code compliance.
• Install difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (recommended to verify W.C. after install). Inspect rubber sensing hose for cracks or blockage before replacing the switch — a clogged hose is a common root cause of pressure switch failure. Note: HK06WC097 includes a mounting bracket and may be required if the original bracket is damaged.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our HVAC parts warehouse.

Compatibility: Engineered and factory-matched for the Carrier GA1AAD048100AAJA packaged unit (4-ton, 100,000 BTU gas/electric configuration). Always verify the W.C. rating printed on your existing switch against unit documentation before ordering. Both OEM part numbers HK06WC085 and HK06WC097 are covered by this listing — select the bracket variant if your installation requires it. Order now — in stock and ships today.