OEM Carrier Pressure Switch HK02ZB038 for Model PH10JA024000ADAA

This is the factory OEM pressure switch (part number HK02ZB038) for the Carrier PH10JA024000ADAA packaged heat pump unit. The pressure switch monitors the inducer motor's airflow by sensing negative pressure in the vent system. When the inducer establishes proper draft, the switch closes and signals the control board to advance the ignition sequence. A failed pressure switch keeps the switch open even when the inducer is running — resulting in a no-heat lockout condition, often with a fault code indicating a pressure switch failure or open pressure circuit.

• Specs: 22" W.C. close / 7" W.C. open | 50" wire leads | OEM Carrier part HK02ZB038 | Also cross-references PS80-02-F0074 pressurestat
• OEM vs Generic: This is the genuine Carrier OEM switch, factory-calibrated to exact W.C. ratings for the PH10JA024000ADAA. Off-spec generic switches with incorrect trip points can cause nuisance lockouts or — worse — allow ignition under unsafe draft conditions.
• Install difficulty: 2/5 — Disconnect power at the breaker before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer (optional, for verification). Photograph or label the hose port and wire connections before removal. Swap leads and hose to the new switch and restore power.
• Warranty: 1-year OEM manufacturer warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed and factory-specified for the Carrier PH10JA024000ADAA packaged heat pump. Always verify the W.C. rating on your unit's wiring diagram or existing switch label before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy — order with confidence and get your system back online today.