OEM Carrier Furnace Pressure Switch 0.18" WC for Model PY3GPAA42060AA

This OEM draft-proving pressure switch is the factory-specified replacement for the Carrier PY3GPAA42060AA packaged gas unit. Originally sold as part number HK06WC061 and now superseded by HK06MB061, this switch monitors inducer blower pressure to confirm safe venting conditions before allowing the gas valve to open. When it fails or sticks open, the furnace will lock out before ignition — typically displaying a fault code and refusing to produce heat even though the inducer motor is running normally.

• Specs: 0.18" W.C. (inches water column) set point | Normally open, closes on draft proof | SPST configuration | Direct OEM replacement for Carrier, Bryant, and Payne packaged units | Cross-references Honeywell IS20224-5236
• OEM vs Generic: OEM pressure switches are calibrated to exact factory W.C. tolerances. Generic substitutes can drift outside spec, causing nuisance lockouts or — more dangerously — failing to detect a blocked flue, creating a carbon monoxide risk.
• Install difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a short length of replacement hose (3/16" I.D.). Always check the rubber tubing for cracks or blockages, as a clogged hose is the most common cause of pressure switch failure.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM fit for Carrier model PY3GPAA42060AA packaged gas/electric unit. Also fits select Bryant and Payne models requiring a 0.18" W.C. draft pressure switch. Verify the W.C. rating on your existing switch's label before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork required.