OEM Carrier Pressure Switch HK06WC061 for Model PY4GNAA48115AA

This is the factory OEM replacement pressure switch (part number HK06WC061) for the Carrier PY4GNAA48115AA packaged gas/electric unit. The pressure switch is a critical safety component that monitors the negative pressure (water column) produced by the inducer draft motor. Once the inducer reaches proper speed and airflow, the switch closes to signal the control board that combustion is safe to proceed. When this switch fails — or its sensing hose becomes cracked or clogged — the system will lock out before ever reaching the ignition stage, leaving you with a no-heat call and a fault code pointing to inducer or pressure switch failure.

• Specs: OEM part number HK06WC061 | Factory-calibrated W.C. (water column) set point | Direct factory replacement — no field calibration required | Includes mounting bracket and pressure port fitting
• OEM vs Generic: This is a genuine Carrier OEM switch, manufactured to exact W.C. trip-point tolerances. Aftermarket pressure switches frequently carry wider tolerances that can cause nuisance lockouts in cold weather or allow unsafe operation near the threshold — OEM is the only safe choice for this safety-critical component.
• Install difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, and a manometer if verifying W.C. rating. Always inspect the rubber sensing hose for cracks or blockages before condemning the switch itself — a $3 hose is a common culprit.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered specifically for the Carrier PY4GNAA48115AA packaged unit. Always cross-reference the W.C. rating stamped on your existing switch and verify the part number on the unit's wiring diagram label before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions. In stock and ships today.