OEM Carrier Furnace Pressure Switch 0.18" WC for Model PY4GPAA48115AA (HK06WC061)

This OEM Carrier draft inducer pressure switch is the factory-specified replacement for the Carrier PY4GPAA48115AA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to confirm proper venting before allowing ignition to proceed. When this switch fails or sticks open, the control board cannot verify that the flue is drawing correctly — resulting in a furnace that locks out before ignition, often flashing a fault code for a failed pressure switch. Note: OEM part number HK06WC061 has been superseded by the updated OEM part number HK06MB061, which is the current factory-authorized direct replacement.

• Specs: 0.18" W.C. (water column) rating | SPST (Single Pole, Single Throw) | Draft inducer proving switch | Factory-matched Honeywell switch assembly
• OEM vs Generic: This is a genuine Carrier OEM replacement, engineered to the exact W.C. rating and switching tolerance for the PY4GPAA48115AA. Off-brand switches with loose W.C. tolerances can cause nuisance lockouts or, worse, allow ignition under unsafe venting conditions.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, manometer (recommended to verify W.C. after install). Always label tubing orientation before removing the old switch.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 5 PM local time.

Compatibility: Fits Carrier model PY4GPAA48115AA packaged unit. Also compatible with select Bryant and Payne models sharing the same 0.18" WC pressure switch specification — verify your data plate before ordering. Cross-references: HK06WC061 (superseded), HK06MB061 (current OEM), Honeywell IS20224-5236. Questions? Our HVAC parts specialists verify fitment before you order.