OEM Carrier High Pressure Switch 395/295 PSI for Model PY2PPB042060NB

This OEM high pressure switch (part number HK02ZA395) is the factory-specified replacement for the Carrier PY2PPB042060NB packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety device — it monitors refrigerant discharge pressure and opens the control circuit when pressure exceeds the factory cutout threshold, shutting the compressor down before catastrophic damage can occur. When this switch fails or trips repeatedly, you'll typically experience nuisance high-pressure lockouts, fault codes on the control board, or a unit that shuts down on hot days under load even when refrigerant charge is correct.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT fitting | 240 VAC rated (6A) | Sensata PS80-03-0018 platform | Factory-matched setpoints
• OEM vs Generic: OEM switches are calibrated to exact factory PSI setpoints (±2%). Aftermarket units can drift in cut-in/cut-out pressure, leading to premature trips or — more dangerously — failure to protect the compressor at true high-pressure events.
• Install difficulty: 2/5 — Recover refrigerant before accessing the high-side port. Tools needed: manifold gauge set, 1/8" NPT thread sealant, adjustable wrench, leak detector. Always confirm system pressure is at zero before removing the switch body.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for Carrier model PY2PPB042060NB. Also supersedes legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Verify the 395/295 PSI setpoint on your unit's wiring diagram before ordering. Need fitment verification? Our HVAC parts specialists confirm compatibility before you buy.