OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GNAB30060NA — HK06WC061

This OEM Carrier pressure switch (part number HK06WC061, superseded by HK06MB061) is the factory-specified replacement for the Carrier PY4GNAB30060NA packaged heat pump unit. The pressure switch monitors negative pressure created by the draft inducer motor to verify proper venting before allowing the ignition sequence to proceed. When the switch fails or sticks, the control board never receives the "draft proven" signal — resulting in a hard lockout with no heat, often accompanied by a diagnostic fault code pointing to a pressure switch fault or inducer failure.

• Specs: 0.18" WC (water column) set point | SPST (single-pole, single-throw) | Honeywell cross-reference: IS20224-5236 / 1639D2/B | Direct drop-in replacement for HK06WC061 and HK06MB061
• OEM vs Generic: This is a genuine Carrier factory-authorized part, manufactured to exact setpoint tolerances. Aftermarket pressure switches frequently drift outside the rated WC specification, causing nuisance lockouts or — worse — failing to detect an actual venting problem, which is a safety hazard.
• Install difficulty: 2/5 — Shut off power to the unit before servicing. Locate the switch on or near the inducer housing. Disconnect the hose port and two wire terminals, then reverse the process to install. Tools needed: flathead screwdriver, needle-nose pliers. Always inspect the rubber hose port for cracks or blockage before reassembly.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered before cutoff.

Compatibility: Fits Carrier model PY4GNAB30060NA packaged heat pump units. Also compatible across Bryant and Payne platforms sharing the HK06WC061 / HK06MB061 specification — verify the 0.18" WC rating on your unit's existing switch before ordering. Have your model number ready and our fitment team will confirm compatibility before your order ships.