OEM Carrier Draft Pressure Switch 0.18" WC for Model PY4GEAB48130AA

This OEM draft inducer pressure switch is the factory-specified replacement for the Carrier PY4GEAB48130AA packaged unit. Originally sold as HK06WC061 and superseded by the current OEM part HK06MB061, this switch proves that the inducer motor has created sufficient negative pressure before allowing the gas valve to open and the ignition sequence to begin. When it fails — or when its hose, port, or inducer is at fault — the system will lock out before ignition, leaving you with a no-heat call. A failed pressure switch is one of the most common causes of furnace lockout codes.

• Specs: 0.18" Water Column (WC) | SPST (Single-Pole Single-Throw) | Normally Open | Replaces OEM part HK06WC061 | Current OEM cross: HK06MB061 | Also crosses to Honeywell IS20224-5236
• OEM vs Generic: OEM switches are calibrated to exact WC ratings. Generic alternatives often carry ±15% trip-point tolerances, risking nuisance lockouts or, worse, a switch that never opens — allowing ignition under unsafe draft conditions.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a manometer (recommended for verification). Photograph all hose and wiring connections before disconnecting. Inspect the rubber hose for cracks or blockages before condemning the switch.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PY4GEAB48130AA packaged unit. This is the OEM-spec 0.18" WC SPST draft pressure switch. Always verify the WC rating on your existing switch before ordering — an incorrect trip point will cause recurring lockouts. Questions about fitment? Our HVAC parts team confirms compatibility before you order — call or chat today.