OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY3GNAA36060AA

This OEM draft pressure proving switch is the factory-specified replacement for the Carrier PY3GNAA36060AA packaged gas unit. The pressure switch monitors negative pressure created by the inducer (draft) motor to confirm adequate venting airflow before the control board allows ignition to proceed. When it fails or sticks open, the furnace or packaged unit will lock out prior to ignition — often with a diagnostic fault code indicating a pressure switch or inducer fault. A faulty pressure switch is one of the most common no-heat service calls on Carrier packaged equipment.

• Specs: 0.18" W.C. (inches water column) setpoint | Single-port draft proving switch | Normally open (N.O.) closes on negative pressure | OEM Part # HK06WC061 (superseded by HK06MB061) | Cross-references Honeywell IS20224-5236
• OEM vs Generic: This OEM switch is factory-calibrated to the exact 0.18" W.C. setpoint required by the PY3GNAA36060AA control board. Off-spec aftermarket switches can trip at incorrect pressures, causing nuisance lockouts or, worse, allowing ignition under unsafe venting conditions.
• Install Difficulty: 2/5 — Shut off gas and power before servicing. Locate the switch on the inducer housing or gas valve assembly. Disconnect the rubber pressure tubing and two-wire harness connector. Swap and reconnect — no special tools required. A manometer is recommended to verify inducer draft pressure post-install. Tools needed: flathead screwdriver, needle-nose pliers.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier PY3GNAA36060AA packaged gas/electric units. Also fits select Bryant and Payne models sharing the same inducer and control board architecture. Always verify the 0.18" W.C. rating on your existing switch before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy — order with confidence and get your system back online today.