OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GNAA24060AA

This OEM Carrier pressure switch (part number HK06WC061, superseded by HK06MB061) is the factory-specified replacement for the Carrier PY4GNAA24060AA packaged unit. The pressure switch monitors the negative pressure created by the draft inducer motor to confirm safe venting conditions before allowing the ignition sequence to proceed. When this switch fails or sticks, the furnace will lock out on a pressure switch fault — typically before the igniter ever glows — leaving you with a no-heat call and a blinking fault code on the control board.

• Specs: 0.18" Water Column (W.C.) rating | SPST (Single Pole, Single Throw) | Draft-proving / inducer-proving switch | Cross-references Honeywell IS20224-5236 | Supersedes OEM part HK06WC061 → current OEM: HK06MB061
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part — manufactured to exact W.C. setpoint tolerances. Aftermarket pressure switches frequently carry ±10–15% W.C. variance, causing nuisance lockouts or, worse, failing to detect true venting faults that can lead to CO spillage.
• Install difficulty: 2/5 — Power down the unit at the disconnect and thermostat before starting. Tools needed: 1/4" nut driver or 5/16" hex driver, needle-nose pliers, and a manometer (recommended to verify W.C. setpoint post-install). Note the hose barb port orientation before disconnecting the rubber pressure tube. Swap terminals one at a time to avoid miswiring.
• Warranty: 1-year OEM manufacturer warranty. Orders placed by 5 PM local time ship same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY4GNAA24060AA packaged units. Also fits a broad range of Carrier, Bryant, and Payne furnaces and packaged units requiring a 0.18" W.C. draft-inducer pressure switch. Always verify the W.C. rating stamped on your existing switch's label before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy — call or chat today.