OEM Carrier Draft Pressure Switch 0.18" WC for Model PY3GEAA42060NA (HK06WC061)

This OEM Carrier draft pressure proving switch is the factory-specified replacement for the Carrier PY3GEAA42060NA packaged gas unit. The pressure switch monitors negative pressure created by the inducer blower motor to verify proper venting before allowing the ignition sequence to proceed. When this switch fails or sticks open, the control board cannot confirm safe draft conditions — resulting in a hard lockout, a no-heat call, or a furnace that flashes a pressure switch fault code without ever attempting ignition.

• Specs: 0.18" W.C. (water column) set point | Normally open | Spade terminal connections | Factory-matched actuation tolerance | Supersedes part numbers HK06WC061 and HK06MB061 (current OEM replacement)
• OEM vs Generic: This is the genuine Carrier factory part, manufactured to exact W.C. rating tolerances. Off-brand pressure switches frequently drift from their rated set point over time, causing nuisance lockouts or — worse — allowing ignition under unsafe draft conditions.
• Install difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer (recommended to verify draft pressure post-install). Before replacing the switch, inspect the rubber hose fitting for cracks or blockages, as a split hose is a common root cause of pressure switch faults.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3GEAA42060NA packaged gas unit. This switch also fits select Bryant and Payne models sharing the same inducer/pressure circuit. Always verify the 0.18" W.C. rating on your unit's existing switch or service manual before ordering. Our HVAC-certified team is available to confirm fitment — reach out before you order if you have any questions.