OEM Carrier Draft Pressure Switch 0.18" WC for Model PY3GNA048115NA (HK06WC061 / HK06MB061)

This OEM Carrier draft pressure switch is the factory-specified replacement for the Carrier PY3GNA048115NA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to confirm proper venting before allowing ignition. When it fails or sticks open, the control board cannot prove a safe flue draft and will lock out the system — leaving you with no heat and often a fault code pointing to inducer or pressure-switch failure.

• Specs: 0.18" Water Column (W.C.) set point | SPST (Single Pole, Single Throw) | OEM Part # HK06WC061, updated successor # HK06MB061 | Also cross-references Honeywell IS20224-5236
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. tolerances at the factory. An off-spec generic switch can cause nuisance lockouts or, worse, allow ignition attempts under unsafe draft conditions — always match the W.C. rating precisely.
• Install difficulty: 2/5 — Power down and confirm the system is off before starting. Disconnect the rubber hose from the inducer port and the two spade terminals. Swap the switch, reconnect hose and terminals, and restore power. Tools needed: flathead screwdriver, needle-nose pliers. Check for cracked hose tubing while you're in there.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY3GNA048115NA packaged unit. OEM part number HK06WC061 has been superseded by HK06MB061 — both are covered by this listing and are direct drop-in replacements. Also fits select Bryant and Payne models sharing this inducer/pressure-switch assembly. Verify the 0.18" W.C. rating on your existing switch before ordering. Need fitment confirmation? Our HVAC parts team will verify compatibility before you buy.