OEM Carrier Draft Pressure Switch 0.18" WC for Model PY3GNA048130AA

This OEM draft pressure switch (part number HK06WC061, now superseded by HK06MB061) is the factory-specified replacement for the Carrier PY3GNA048130AA packaged unit. The pressure switch monitors inducer motor operation by sensing negative air pressure in the flue system. When the inducer creates sufficient draft, the switch closes to allow the ignition sequence to proceed. A failed pressure switch prevents the furnace from advancing past the inducer stage — resulting in a lockout condition, a flashing fault code, or a system that runs the inducer continuously but never attempts to ignite.

• Specs: 0.18" WC (inches water column) set point | Normally open | Single-port diaphragm-type | Factory-matched Honeywell IS20224-5236 equivalent | Superseded OEM part: HK06MB061
• OEM vs Generic: OEM pressure switches are calibrated to exact water column specifications at the factory. Generic substitutes often carry ±0.05" WC tolerances that can cause nuisance lockouts or — worse — allow the furnace to run with inadequate draft, creating a flue gas hazard.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, digital manometer (recommended to verify draft after install). Label and photograph existing tubing orientation before disconnecting the pressure port hose.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model PY3GNA048130AA packaged unit. Also compatible with select Bryant and Payne models sharing the 0.18" WC pressure switch specification. Always verify the WC rating on your existing switch or unit data plate before ordering. Not sure about fitment? Our HVAC parts specialists confirm compatibility before you buy — reach out before placing your order.