OEM Carrier Draft Pressure Switch 0.18" WC for Model PY3GPAA60115NA (HK06WC061 / HK06MB061)

This OEM Carrier draft pressure switch is the factory-specified replacement for the Carrier PY3GPAA60115NA packaged gas unit. The pressure switch monitors negative pressure created by the induced draft blower to confirm that proper venting airflow is established before allowing the ignition sequence to proceed. When this switch fails or sticks open, the control board cannot verify inducer operation and the furnace or packaged unit will lock out — typically resulting in a no-heat condition with a flashing fault code for "pressure switch open" or "inducer fault" on the board.

• Specs: 0.18" W.C. (inches water column) set point | Normally open | Single-port | Direct OEM replacement for HK06WC061 — current OEM successor part HK06MB061 | Honeywell cross-reference: IS20224-5236
• OEM vs Generic: This is a factory-authorized OEM part built to exact W.C. tolerance specifications. Generic pressure switches with wider tolerances can cause nuisance lockouts or — worse — fail to detect a true venting blockage, creating a safety hazard.
• Install difficulty: 2/5 — Shut off power and gas before beginning. Tools needed: 1/4" nut driver, flat-head screwdriver, and a manometer (recommended to verify set point after install). Disconnect the rubber hose and two wiring terminals, swap the switch, and reconnect. Always inspect the hose for cracks or blockages while the switch is removed.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Direct OEM replacement for Carrier PY3GPAA60115NA packaged gas units. Also fits select Bryant and Payne models sharing the HK06WC061 / HK06MB061 specification — verify the 0.18" W.C. rating on your unit's existing switch before ordering. Not sure it fits? Our parts team confirms fitment before you buy.