OEM Carrier Draft Pressure Switch 0.18" WC for Model PY4GPAB60115AA

This is the factory-authorized OEM draft inducer pressure switch for the Carrier PY4GPAB60115AA packaged unit. The pressure switch proves that the inducer motor has created adequate negative pressure in the heat exchanger flue before allowing the ignition sequence to begin. When this switch fails or gets stuck open, the control board interprets it as an unsafe venting condition and locks out the system — resulting in a no-heat call with the furnace never advancing past the inducer stage. OEM part number HK06WC061 has been superseded by HK06MB061, the current factory-authorized replacement at the same 0.18" water column rating and identical SPST configuration.

• Specs: 0.18" W.C. (water column) opening rating | SPST (Single-Pole Single-Throw) | Normally open | Rated for Carrier/Bryant/Payne packaged and split systems | Replaces OEM part HK06WC061 (superseded by HK06MB061)
• OEM vs Generic: This OEM switch is calibrated to the exact 0.18" W.C. factory threshold. Aftermarket switches frequently carry ±10–15% tolerance variance, which can cause nuisance lockouts or — worse — fail to detect genuine venting failures, creating a safety hazard.
• Install difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer if verifying inducer static pressure. Photograph existing hose and wiring connections before removal. Swap the rubber hose and two-wire harness connector to the new switch and restore power.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Directly fits the Carrier PY4GPAB60115AA packaged unit. Also compatible with a wide range of Carrier, Bryant, and Payne packaged and split-system models specifying a 0.18" W.C. SPST pressure switch — always verify the W.C. rating on your existing switch's label before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.