OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GNAB24060AA

This OEM draft pressure switch (part HK06WC061, now superseded by HK06MB061) is the factory-specified replacement for the Carrier PY4GNAB24060AA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to confirm safe venting conditions before allowing ignition. When it fails or sticks open, the control board cannot verify that combustion gases are being properly exhausted — resulting in a hard lockout, a no-heat condition, or a system that never advances past the inducer pre-purge stage.

• Specs: 0.18" Water Column (WC) set point | Normally open (NO) configuration | Single-port design | Replaces OEM part HK06WC061 / superseded by HK06MB061 | Cross-references Honeywell IS20224-5236 and 1938D2/B
• OEM vs Generic: This OEM-grade switch is calibrated to the exact 0.18" WC set point required by your Carrier system. Off-spec generic switches can trip too early or too late, causing nuisance lockouts or — more dangerously — allowing ignition attempts without confirmed draft.
• Install difficulty: 2/5 — Turn off power and gas before beginning. Tools needed: 1/4" nut driver, flathead screwdriver, needle-nose pliers. Disconnect the rubber pressure hose and two wire leads, swap the switch, and verify hose is fully seated. Always check for cracked or collapsed tubing while the unit is open.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY4GNAB24060AA packaged unit. Also fits a broad range of Carrier, Bryant, and Payne furnaces, packaged units, and heat pumps requiring a 0.18" WC draft pressure switch. Confirm the WC rating on your existing switch or equipment data plate before ordering. Our team is happy to verify fitment — contact us before you order.