OEM Carrier Pressure Switch HK02ZB044 — 7 PSI Open / 22 PSI Close for Model PY1RPA150224ADWB

This OEM Carrier pressure switch (part number HK02ZB044) is the factory-specified replacement for the PY1RPA150224ADWB system. The pressure switch monitors inducer motor performance by proving a negative pressure differential before the ignition sequence is allowed to proceed. When the switch fails or sticks open, the control board cannot confirm safe venting conditions — resulting in a no-heat lockout, flashing fault codes, or a furnace that attempts ignition and immediately shuts down.

• Specs: 7 PSI open | 22 PSI close | 24V control circuit | 50" wire leads | Country of Origin: Mexico | Factory-matched sensing thresholds for precise pressure proof
• OEM vs Generic: This is a genuine Carrier OEM part engineered to exact factory tolerances. Aftermarket pressure switches frequently feature mismatched W.C. ratings and inferior diaphragm materials, causing nuisance trips or unsafe ignition attempts. OEM ensures the pressure proof setpoints remain accurate for the life of the part.
• Install difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer to verify W.C. readings post-install. Photograph all wiring connections before removal. Inspect the rubber hose barb and tubing for cracks or blockages — a clogged hose is a common cause of switch failure.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as a direct drop-in replacement for Carrier model PY1RPA150224ADWB. Verify your unit's existing switch ratings (open/close PSI and lead length) against the data label before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you buy for total peace of mind. Order today and receive fast same-day shipping on all in-stock parts.