OEM Carrier Pressure Switch HK02ZB044 — 7#OPN / 22#CLS / 50" Leads for Model PY1REA120224ABWB

This is the genuine OEM Carrier pressure switch (part number HK02ZB044), factory-specified for the Carrier PY1REA120224ABWB. The pressure switch is a critical safety and sequencing component: it monitors inducer motor draft pressure to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails or becomes stuck open, the furnace will enter a pre-ignition lockout — the inducer will run but the igniter will never energize, leaving you with no heat. A faulty pressure switch is one of the most common causes of a furnace that starts the inducer but never moves into the heating cycle.

• Specs: Opens at 7 PSI | Closes at 22 PSI | 24V control circuit | 50" wire leads | Country of Origin: Mexico | OEM Part Number: HK02ZB044
• OEM vs Generic: This is the factory-original Carrier component, engineered to exact design-life specifications. Generic pressure switches often carry wider pressure tolerances, which can lead to nuisance lockouts or, worse, unsafe ignition attempts in poor-draft conditions.
• Install difficulty: 2/5 — Turn off power and gas to the unit before beginning. Tools needed: flathead screwdriver, needle-nose pliers, and a manometer (recommended) to verify draft pressure after installation. Photograph existing wiring and hose routing before disconnecting anything.
• 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 PY1REA120224ABWB. Always verify the part number on your existing switch's label and confirm hose port sizing before ordering. Our fitment team is available to confirm compatibility before you buy — don't guess on a safety-critical component.