OEM Carrier Pressure Switch HK02ZB044 for Model PY1REA150224ADWA

This OEM Carrier pressure switch (part# HK02ZB044) is the factory-specified replacement for the Carrier PY1REA150224ADWA. The pressure switch is a critical safety device that monitors inducer assembly operation by sensing negative air pressure (draft) before allowing the ignition sequence to proceed. When the switch fails or becomes stuck open, the control board cannot confirm safe venting conditions — resulting in a lockout, no-heat call, or a furnace that attempts ignition but shuts down before the burners fire. A faulty pressure switch is one of the most common causes of furnace no-heat service calls.

• Specs: Opens at 7" W.C. | Closes at 22" W.C. | 50" wire leads | 24V control circuit | OEM part# HK02ZB044 | Country of origin: Mexico
• OEM vs Generic: This is a genuine Carrier OEM switch, manufactured to exact factory pressure tolerances. Generic aftermarket switches frequently carry wider setpoint tolerances that can cause nuisance lockouts, premature failure, or — more critically — allow ignition under unsafe draft conditions.
• Install Difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer if verifying draft pressure. Photograph existing hose and wire routing before removal. Swap hose connections and wire leads directly to the new switch and restore power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY1REA150224ADWA. Always verify the pressure rating stamped on the original switch body or your unit's wiring diagram before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you buy — no guesswork required.