OEM Carrier Draft Pressure Switch 0.18" WC SPST for Model PY3GPAA48130NA

This OEM Carrier draft pressure proving switch (part HK06WC061, superseded by HK06MB061) is the factory-specified replacement for the Carrier PY3GPAA48130NA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to confirm safe draft conditions before allowing the ignition sequence to proceed. When it fails or sticks open, the control board cannot verify inducer operation — resulting in a no-heat lockout, typically before the gas valve ever opens.

• Specs: 0.18" Water Column (W.C.) rating | SPST (Single-Pole, Single-Throw) | Normally open | Factory OEM tolerance | Replaces HK06WC061 & Honeywell IS20224-5236
• OEM vs Generic: OEM switches are calibrated to exact W.C. setpoints. An off-spec aftermarket switch can trip too early or too late, causing nuisance lockouts or — worse — allowing ignition under unsafe draft conditions.
• Install difficulty: 2/5 — Power down and confirm inducer has stopped before disconnecting tubing. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (recommended for verification). Photograph hose routing before removal. Swap hose and two wire terminals, then restore power and observe one full heat call.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY3GPAA48130NA packaged unit. Also fits select Bryant and Payne models using the 0.18" W.C. SPST pressure switch specification — verify your unit's data plate W.C. rating before ordering. Note: HK06WC061 has been officially superseded by HK06MB061; both part numbers are fulfilled with the current OEM revision. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.