OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY3GPAA60090AA (HK06WC061)

This is the OEM-specified draft inducer pressure switch for the Carrier PY3GPAA60090AA packaged gas unit. The pressure switch is a critical safety device that monitors negative pressure created by the inducer motor to confirm proper venting before allowing ignition. When it fails or sticks open, the control board cannot verify safe flue conditions and will lock out the system — preventing any heat from being produced. Common symptoms include a furnace that attempts to start but shuts down before ignition, a blinking fault code indicating "pressure switch open," or a unit that runs the inducer continuously without progressing to the heating cycle.

• Specs: 0.18" WC (water column) set point | SPST (single-pole, single-throw) | Factory-matched Honeywell switching element | Replaces OEM part numbers HK06WC061 and superseding part HK06MB061
• OEM vs Generic: This OEM pressure switch is calibrated to the exact 0.18" WC trip point required by the Carrier PY3GPAA60090AA. Generic aftermarket switches often carry ±10–15% pressure tolerances, which can cause nuisance lockouts or — more dangerously — allow ignition under marginal venting conditions.
• Install Difficulty: 2/5 — Power down the unit and allow the inducer to fully stop before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer (recommended for verification). Photograph the hose connection and wiring harness before removal. Swap the pressure tube and two-wire connector, then restore power to test.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship the same business day when ordered before 3:00 PM local time.

Compatibility: Designed for the Carrier PY3GPAA60090AA packaged gas/electric unit. Also fits select Bryant and Payne models sharing this 0.18" WC switch specification — verify the rating on your existing switch or equipment data plate before ordering. Note: HK06WC061 has been superseded by HK06MB061; both part numbers are fulfilled by this listing. Questions about fitment? Our HVAC parts specialists confirm compatibility before every order.