OEM Carrier Draft Pressure Switch 0.18" WC for Model PY4GNAC30060NA

This OEM draft pressure switch is the factory-specified replacement for the Carrier PY4GNAC30060NA packaged unit. The pressure switch is a critical safety component that monitors negative pressure created by the inducer motor to confirm proper venting before the ignition sequence is allowed to proceed. When this switch fails or sticks, the control board interprets it as a venting fault and locks out the furnace — resulting in a no-heat call, a flashing fault code, or a system that attempts ignition and immediately shuts down.

• Specs: 0.18" W.C. (water column) setpoint | Draft-proving (normally open) | OEM Part # HK06WC061 / Superseded by HK06MB061 | Replaces Honeywell IS20224-5236 | Factory-matched switching tolerance
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. tolerances at the factory. Aftermarket units often drift outside spec, causing nuisance lockouts or — worse — allowing ignition during inadequate draft conditions. Always use OEM for safety-critical components.
• Install difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, flashlight. Disconnect the rubber hose and two wire leads, swap the switch, and confirm tubing is seated without kinks. Check for fault codes before and after replacement.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Direct OEM replacement for Carrier PY4GNAC30060NA packaged units. This part is also used across select Bryant and Payne models sharing the same inducer/venting assembly. Verify the 0.18" W.C. rating on your unit's existing switch or wiring diagram before ordering. Our team is available to confirm fitment — don't guess on safety parts.