OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GNAA30060AA

This OEM Carrier pressure switch (part number HK06WC061, superseded by HK06MB061) is the factory-specified draft inducer proving switch for the Carrier PY4GNAA30060AA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to verify safe venting conditions before allowing the gas valve to open. When it fails or sticks open, the furnace will lock out before ever reaching the ignition stage — leaving you with a no-heat call and a blinking fault code.

• Specs: 0.18" Water Column (W.C.) set point | SPST (Single Pole, Single Throw) | Normally open | Compatible with Honeywell cross-reference IS20224-5236 / 1639D2/B | Direct OEM factory replacement
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. tolerances at the factory. Generic aftermarket switches frequently drift outside spec, causing nuisance lockouts or — more dangerously — failing to detect a blocked flue condition.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a U-tube manometer or digital magnehelic gauge to verify switch set point after replacement. Always inspect the rubber pressure hose for cracks while the switch is out.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PY4GNAA30060AA packaged unit. Also fits select Bryant and Payne models sharing the same inducer assembly and 0.18" W.C. switch specification — verify your data plate before ordering. Note: OEM part number HK06WC061 has been superseded by HK06MB061; both designations are fulfilled with the current production part. Questions about fitment? Our HVAC parts specialists verify compatibility before every order.