OEM Carrier Draft Proving Pressure Switch 0.18" WC for Model PY3GNA036060NA

This OEM draft pressure proving switch is the factory-specified replacement for the Carrier PY3GNA036060NA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails or sticks, the control board cannot verify safe draft conditions — resulting in a furnace lockout before ignition, a blinking fault code, or a system that attempts to start and immediately shuts down. Part number HK06WC061 has been updated by the manufacturer to successor part HK06MB061, which is a direct OEM drop-in replacement with identical specifications.

• Specs: 0.18" W.C. (water column) set point | Normally open | Single-port diaphragm design | Factory-calibrated for precise draft proving | Compatible with Carrier, Bryant, and Payne platforms
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. tolerances at the factory. Aftermarket units can drift out of spec, causing nuisance lockouts or — worse — failing to detect a blocked flue, which is a safety-critical failure.
• Install difficulty: 2/5 — Shut off power and gas before beginning. Tools needed: 1/4" nut driver, flathead screwdriver, and needle-nose pliers. Disconnect the single rubber hose port and two spade wire terminals, then reverse to install. Always inspect the hose and port for cracks or blockages while the switch is out.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY3GNA036060NA packaged unit. Also fits a wide range of Carrier, Bryant, and Payne furnaces, packaged units, heat pumps, and air handlers requiring a 0.18" W.C. normally-open draft pressure switch. Verify the W.C. rating on your existing switch or equipment data plate before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions. In stock and ships today.