OEM Carrier Pressure Switch HK02ZB044 for Model PY1RPA150224ADWA

This OEM pressure switch (part HK02ZB044) is the factory-specified replacement for the Carrier PY1RPA150224ADWA packaged unit. The pressure switch monitors inducer motor airflow by sensing negative pressure (draft) in the heat exchanger flue. When the inducer creates adequate draw, the switch closes to allow the control board to proceed with the ignition sequence. A failed or stuck-open pressure switch prevents the furnace or packaged unit from ever reaching ignition — the system typically locks out after 3 attempts with no spark or gas call, and the fault code will point directly to draft pressure not proved.

• Specs: Opens at 7" W.C. | Closes at 22" W.C. | 50" wire leads | 24V control circuit | Single-port diaphragm type | Country of Origin: Mexico
• OEM vs Generic: This is a genuine Carrier OEM part. Factory-spec diaphragm tolerances are proprietary and not available to aftermarket manufacturers — generic switches can trip at incorrect thresholds, causing nuisance lockouts or dangerous over-firing conditions.
• Install difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, manometer (to verify W.C. rating post-install). Always inspect the hose port and tubing for cracks or blockage before condemning the switch.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PY1RPA150224ADWA packaged unit. Verify the W.C. rating stamped on your existing switch before ordering — multiple pressure switch ratings are used across the PY1 product family. Our fitment team is available to confirm compatibility before you buy. Order now and ship today.