OEM Carrier Pressure Switch HK06WC061 for Model PY4GPAA30040AA

This is the factory OEM replacement pressure switch for the Carrier PY4GPAA30040AA packaged gas/electric unit. The pressure switch is a safety device that monitors the negative pressure created by the inducer (draft) motor to confirm proper venting and combustion airflow before allowing ignition. When the switch fails — or when it reads an out-of-range pressure — the control board halts the ignition sequence, resulting in a no-heat condition, a fault code, or repeated lockouts. Common symptoms of a failed pressure switch include the furnace or packaged unit failing to progress past the inducer stage, a stuck open or stuck closed switch reading on diagnostics, or nuisance trips on a unit that is otherwise venting correctly.

• Specs: OEM Part Number HK06WC061 | Factory W.C. (water column) rating matched to Carrier PY4GPAA30040AA | Single-port design | 1/4" Spade terminals
• OEM vs Generic: This is the exact factory-specified switch, calibrated to the precise W.C. rating required by your unit. Generic alternatives often carry wider trip-point tolerances that can cause nuisance lockouts or — more dangerously — allow ignition under unsafe venting conditions.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, manometer (recommended for post-install verification). Inspect the rubber hose port and tubing for cracks or blockages before installing the new switch.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier PY4GPAA30040AA packaged gas/electric units. Always verify the W.C. rating stamped on your existing switch matches HK06WC061 before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by — order today and ship same day.