OEM Carrier Pressure Switch for Model GA2AAD048110ACJA — HK06WC085 / HK06WC097

This OEM pressure switch is the factory-specified replacement for the Carrier GA2AAD048110ACJA packaged gas unit. The pressure switch monitors negative pressure created by the inducer draft motor to confirm proper venting before allowing the ignition sequence to proceed. When the switch fails or the sensing hose cracks, the control board never receives the "inducer proven" signal — resulting in a hard lockout, no heat, and often a blinking fault code indicating a pressure switch fault. Two OEM part numbers cover this application: HK06WC085 (standard pressure switch) and HK06WC097 (pressure switch with mounting bracket). Verify your existing part number on the switch body before ordering to ensure correct fitment.

• Specs: Designed for Carrier GA2AAD048110ACJA (4-ton, 110,000 BTU packaged gas/electric unit) | Factory-matched W.C. (water column) rating | Replaces OEM part numbers HK06WC085 and HK06WC097 | Single-port or dual-port sensing hose connection depending on variant
• OEM vs Generic: OEM pressure switches are calibrated to the exact water-column rating specified for this model's inducer and heat exchanger. Aftermarket substitutes frequently use broader W.C. tolerances that can allow unsafe venting conditions to go undetected, risking nuisance lockouts or, in worst cases, carbon monoxide hazards.
• Install difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, multimeter (continuity test). Inspect the rubber sensing hose and port for cracks or blockage before replacing the switch — a clogged hose is a common root cause of switch failure. Photograph all hose routing prior to removal.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered for Carrier model GA2AAD048110ACJA packaged gas/electric units. Select HK06WC085 if your original switch has no attached bracket, or HK06WC097 if the bracket is integrated. Always cross-reference the W.C. rating printed on your existing switch body. Not sure which variant you need? Our HVAC parts specialists verify fitment before you order — contact us before purchasing.