OEM Carrier Furnace Pressure Switch 0.18" WC — HK06WC061 for Model PY3GNA042090AA

This is the factory-specified OEM draft inducer pressure switch for the Carrier PY3GNA042090AA gas furnace. The pressure switch is a critical safety component that proves the inducer motor is producing adequate negative pressure before allowing the control board to proceed with ignition. When it fails or sticks open, the furnace will typically lock out before the ignition sequence begins — leaving you with no heat and a flashing fault code indicating a pressure switch fault.

• Specs: 0.18" W.C. (Inches Water Column) set point | Single-pole, normally open | Honeywell-manufactured (OEM cross: IS20224-5236) | Factory-authorized replacement part
• OEM vs Generic: This OEM switch is calibrated to the exact 0.18" W.C. actuation point required by Carrier. Generic alternatives often carry wider tolerances, which can cause nuisance trips or — worse — fail to detect a true blocked flue condition, creating a safety hazard.
• Install Difficulty: 2/5 — Power down and lock out the furnace before beginning. Tools needed: 1/4" nut driver, flat-head screwdriver, needle-nose pliers. Always inspect and clear the rubber pressure tubing before installing the new switch; a cracked or blocked hose is a common root cause of switch failure.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for the Carrier PY3GNA042090AA packaged gas furnace/heat pump unit. Note: HK06WC061 has been superseded by OEM part number HK06MB061 — both are functionally identical 0.18" W.C. switches and either number may be fulfilled. Verify your existing switch's W.C. rating on the data plate or switch label before ordering. Our fitment team is available to confirm compatibility prior to purchase.