OEM Carrier High Pressure Switch HK02ZA395 / HK02ZB044 for Model PH1PNA060000AABA

This genuine OEM Carrier high pressure switch (part numbers HK02ZA395 and HK02ZB044) is the factory-specified refrigerant-side safety switch for the Carrier PH1PNA060000AABA packaged heat pump unit. The high pressure switch monitors refrigerant circuit pressure and opens the control circuit when system pressure exceeds safe limits, protecting the compressor from catastrophic damage. When this switch fails or trips and does not reset, you'll experience symptoms such as nuisance high-pressure lockouts, a system that shuts down on warm days, or a unit that runs briefly then faults out with no cooling or heating output.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread connection | 240 VAC rated | SPST normally closed | Sensata PS80-03-0018 cross-reference
• OEM vs Generic: This is a genuine Carrier OEM part engineered to exact factory cut-out and cut-in pressure tolerances. Aftermarket switches can carry ±5–10% pressure variance, risking premature trips or — worse — failure to protect the compressor under true overpressure conditions.
• Install difficulty: 3/5 — Refrigerant-side work. The system must be recovered before replacing this switch if it is installed in-line with the high-side refrigerant circuit. Tools needed: manifold gauge set, 1/8" NPT fittings, Schrader valve core tool, refrigerant recovery equipment, and a multimeter to confirm open/closed state before reinstallation. Licensed HVAC technician recommended.
• Warranty: 1-year OEM factory warranty against defects. Orders ship same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier PH1PNA060000AABA packaged heat pump. Also replaces legacy Carrier part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Always verify the part number on your existing switch's label before ordering. In stock and ready to ship — order by 3 PM for same-day dispatch.