OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY3GPAA48130AA

This OEM draft inducer pressure switch is the factory-specified replacement for the Carrier PY3GPAA48130AA packaged unit. The pressure switch proves that the inducer motor has established adequate negative pressure (draft) inside the heat exchanger before allowing the ignition sequence to begin. Rated at -0.18" water column (WC), it is a normally open switch that closes when sufficient negative pressure is detected. When this switch fails or sticks open, the control board cannot confirm draft, and the furnace will lock out before ignition — leaving you with a no-heat call and a blinking fault code. Common symptoms include the inducer running but the system refusing to advance to ignition, or repeated short cycling with a pressure-switch fault code.

• Specs: -0.18" WC set point | Single-port, normally open | Replaces OEM Part# HK06WC061 (superseded to HK06MB061) | Cross-references Honeywell IS20224-5236 | Factory Authorized Part
• OEM vs Generic: OEM pressure switches are calibrated to the exact WC set point required by your unit's heat exchanger design. Generic aftermarket switches often carry wider tolerances, which can cause nuisance lockouts or, worse, allow operation with insufficient draft — a safety risk.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, and manometer (optional, for verification). Photograph existing wiring and tubing routing before disconnecting. Check silicone pressure tubing for cracks while the panel is open.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY3GPAA48130AA packaged gas/electric unit. Also fits select Bryant and Payne models sharing this pressure switch specification — verify the 0.18" WC rating and port configuration against your unit's data plate before ordering. Note: HK06WC061 has been superseded by HK06MB061; both part numbers are fulfilled with the current production replacement. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order.