OEM Carrier Furnace Draft Pressure Switch 0.18 WC for Model PY3GPAA60115AA

This OEM draft inducer pressure switch is the factory-specified replacement for the Carrier PY3GPAA60115AA packaged gas unit. The pressure switch monitors negative air pressure produced by the draft inducer motor and signals the control board that safe venting is confirmed before the ignition sequence begins. When this switch fails or sticks, the furnace will lock out before ignition — typically with no heat, a blinking fault code, or an inducer that runs continuously without advancing to the heating cycle.

• Specs: 0.18" W.C. (inches water column) setpoint | Draft proving / normally-open | Single-port design | Factory-matched trip point tolerance | Replaces OEM part numbers HK06WC061 and HK06MB061, and Honeywell IS20224-5236
• OEM vs Generic: OEM pressure switches are calibrated to the exact W.C. rating required by Carrier's inducer assembly. An off-spec generic switch can trip too early or too late, masking real venting problems and creating unsafe operating conditions.
• Install difficulty: 2/5 — Disconnect power before servicing. Tools needed: flat-head screwdriver, needle-nose pliers, and a short length of replacement 3/16" I.D. silicone tubing (recommended). Photograph the hose and wiring connections before removal. Verify the inducer port and hose are clear of condensate blockage before installing the new switch.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for Carrier model PY3GPAA60115AA packaged gas heating/cooling units. Also fits select Bryant and Payne models sharing the 0.18" W.C. pressure switch specification — verify the W.C. rating on your existing switch or unit data plate before ordering. Our fitment team is available to confirm compatibility before you buy.