OEM Carrier High Pressure Switch HK02ZA395 — 406/300 PSI for Model PH1PEA060000AABA

This OEM high-pressure safety switch is the factory-specified replacement for the Carrier PH1PEA060000AABA packaged heat pump unit. The high-pressure switch continuously monitors refrigerant circuit pressure on the discharge side of the compressor. When system pressure exceeds the rated cutout threshold — due to a blocked condenser coil, failed condenser fan motor, refrigerant overcharge, or restricted airflow — the switch opens the safety circuit and locks out the compressor, protecting it from catastrophic failure. Symptoms of a failed switch include nuisance high-pressure faults, a compressor that won't energize, or a system that trips immediately after startup.

• Specifications: Opens at 406 PSI | Closes at 300 PSI | 1/8" NPT male thread | 240 VAC rated | SPST normally closed | Sensata PS80-03-0018 platform | OEM Part Numbers: HK02ZA395 (High Pressure Switch) & HK02ZB044 (Low Pressure Switch)
• OEM vs Generic: This is a genuine Carrier OEM part engineered to exact factory pressure thresholds. Aftermarket switches often carry wider ±5–10% tolerance bands on open/close setpoints, risking either nuisance trips or delayed cutout — both of which shorten compressor life.
• Install Difficulty: 3/5 — Requires EPA 608 certification to handle refrigerant. The system must be recovered or isolated before replacing the high-pressure switch. Tools needed: refrigerant manifold gauges, adjustable wrench, thread sealant tape, and a multimeter to verify continuity after installation. Always confirm the root cause of the high-pressure fault before replacing the switch.
• Warranty & Shipping: 1-year OEM factory warranty against defects in materials and workmanship. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH1PEA060000AABA 5-ton packaged heat pump unit. Also cross-references legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Verify your unit's data plate and existing switch thread size before ordering. Our technical team is available to confirm fitment — contact us before you buy.