OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GPAB60130AA

This OEM draft pressure proving switch (part number HK06WC061, superseded by HK06MB061) is the factory-specified replacement for the Carrier PY4GPAB60130AA packaged unit. The pressure switch monitors negative pressure produced by the inducer blower to confirm safe flue-gas venting before the ignition sequence is allowed to proceed. When this switch fails or sticks open, the control board cannot verify inducer operation, causing a pre-ignition lockout — the system will attempt to start, fail to prove the inducer, and lock out with a diagnostic fault code before any gas is ever introduced to the burners.

• Specs: 0.18" W.C. (water column) set point | Normally open | Single-port diaphragm design | Honeywell cross-reference: IS20224-5236 | Factory-matched switching threshold ±0.02" W.C.
• OEM vs Generic: OEM switches are calibrated at the exact set-point required by your unit's heat exchanger design. Off-tolerance generic switches can trip early (nuisance lockouts) or fail to trip late (dangerous unvented combustion), making OEM the only safe choice for pressure switch replacement.
• Install difficulty: 2/5 — Turn off gas and power at the disconnect before beginning. Tools needed: 1/4" nut driver, flat-head screwdriver, manometer (to verify new switch operation). Inspect rubber hose port and tubing for cracks or blockage before installing the new switch — a blocked tube is a common root cause of switch failure.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY4GPAB60130AA. Also fits select Bryant and Payne packaged units, heat pumps, and air handlers requiring a 0.18" W.C. normally-open draft proving switch. Always verify the W.C. rating printed on your original switch label before ordering — W.C. ratings are not interchangeable. Our fitment team is available to confirm compatibility before you buy.