OEM Carrier Pressure Switch for Model GA1AAD036085AAJA (HK06WC085 / HK06WC097)

This is the factory-specified OEM pressure switch replacement for the Carrier GA1AAD036085AAJA gas furnace. The pressure switch is a safety device that monitors the inducer motor's negative pressure (draft) to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails, the furnace control board cannot verify safe combustion airflow, resulting in a locked-out system that will not advance past the inducer stage — leaving you with no heat. Common symptoms include the inducer running continuously with no ignition, a flashing fault code indicating pressure switch failure, or the furnace cycling on and off repeatedly without lighting.

• Specs: Rated to factory W.C. (water column) specification for GA1AAD036085AAJA | Single-port pressure switch | 24V control circuit compatible | Available as HK06WC085 (switch only) or HK06WC097 (switch with mounting bracket — recommended for direct swap)
• OEM vs Generic: OEM Carrier pressure switches are calibrated to the exact W.C. rating required by this furnace model. Generic substitutes often use broader tolerances that can cause nuisance lockouts or, worse, allow operation under unsafe draft conditions. Always use OEM for pressure switches.
• Install difficulty: 3/5 — Requires disconnecting the rubber hose from the inducer housing and swapping the wiring harness connector. Tools needed: flathead screwdriver, needle-nose pliers, and a manometer if verifying W.C. post-install. Always shut off power and gas before beginning. If replacing with HK06WC097, use the included bracket to secure the switch to the blower deck.
• Warranty: 1-year OEM factory warranty. Orders placed by 3 PM ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier GA1AAD036085AAJA gas furnace. Order HK06WC085 if your existing switch is mounted and bracket is intact; order HK06WC097 if the bracket is damaged or missing. Verify your existing part number on the switch body label before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.