OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY3GNA036060AA

This OEM draft pressure switch is the factory-specified replacement for the Carrier PY3GNA036060AA packaged unit. The pressure switch monitors negative pressure produced by the inducer motor to confirm safe venting before allowing the ignition sequence to proceed. When it fails or sticks open, the control board detects no proof-of-draft signal and locks out the system — typically presenting as a no-heat call with the inducer running but the burners never lighting. Replacing this switch restores the proper pressure-proving circuit and gets your system back online.

• Specs: 0.18" W.C. (water column) set point | Normally open (N.O.) configuration | Single-port hose barb connection | Cross-references Honeywell IS20224-5236 | Supersedes legacy part number HK06WC061 — current OEM part number HK06MB061
• OEM vs Generic: This is a genuine Carrier factory-authorized pressure switch engineered to exact W.C. tolerances. Aftermarket switches frequently deviate from rated set points, causing nuisance lockouts or — worse — failure to prove unsafe venting conditions.
• Install Difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (recommended for verification). Disconnect the rubber hose from the inducer port, swap the switch, reconnect leads and hose, then confirm normal ignition sequence on first call for heat.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model PY3GNA036060AA packaged gas/electric unit. This switch also fits select Bryant and Payne models sharing the same inducer assembly. Always verify the W.C. rating on your existing switch or the unit's wiring diagram before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any doubts.