OEM Carrier Draft Pressure Switch 0.18" WC (HK06WC061) for Model PY4GNAB60130AA

This OEM Carrier draft pressure switch is the factory-specified replacement for the Carrier PY4GNAB60130AA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to confirm proper venting before allowing ignition. When it fails or sticks open, the control board cannot verify safe draft conditions — resulting in a heating lockout before the igniter ever fires. Common symptoms include a no-heat call where the inducer runs but the system never advances to ignition, or a fault code indicating a pressure switch trip.

• Specs: 0.18" Water Column (W.C.) set point | SPST (Single-Pole Single-Throw) | Normally open | OEM part HK06WC061, superseded by HK06MB061 | Replaces Honeywell IS20224-5236
• OEM vs Generic: OEM pressure switches are factory-calibrated to the exact 0.18" W.C. trip point for this unit. Generic alternatives often carry wider tolerances that can cause nuisance trips or — more dangerously — fail to detect a true venting problem.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer (recommended to verify draft pressure after install). Always inspect the hose port and tubing for blockages before condemning the switch.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Direct OEM fit for Carrier model PY4GNAB60130AA. Note that HK06WC061 has been superseded by Carrier part HK06MB061 — both are the identical 0.18" W.C. SPST switch and are fully interchangeable. Verify the W.C. rating on your unit's wiring diagram or existing switch before ordering. Our fitment team is available to confirm compatibility before you buy.