OEM Carrier High Pressure Switch 395/295 PSI — HK02ZA395 for Model PY2PPB048090AA

This is the genuine OEM Carrier high pressure switch (part number HK02ZA395), the factory-specified refrigerant-side safety device for the Carrier PY2PPB048090AA packaged heat pump system. The high pressure switch continuously monitors refrigerant discharge pressure and opens the circuit to shut down the compressor when pressure exceeds a safe threshold — protecting the compressor from catastrophic over-pressure damage. When this switch fails or trips, you'll typically experience sudden system shutdowns, nuisance lockouts, or the unit running briefly before cutting off on a fault code. A faulty switch that stays open will prevent the system from running at all; one that fails closed removes a critical safety layer from your equipment.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread connection | 240 VAC rated | Sensata PS80-03-0018 manufactured | Replaces: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401
• OEM vs Generic: This OEM switch is manufactured to exact Carrier cut-in/cut-out pressure tolerances. Aftermarket substitutes often deviate from factory PSI thresholds, risking nuisance trips or — more dangerously — inadequate compressor protection under high-load conditions.
• Install difficulty: 2/5 — Refrigerant system must be recovered before replacing this switch on most installations. Tools needed: manifold gauge set, 1" open-end wrench, thread sealant (approved for refrigerant service), multimeter for continuity verification. Always confirm zero refrigerant pressure before loosening the fitting.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for the Carrier PY2PPB048090AA packaged heat pump unit. Verify your existing switch's PSI ratings and NPT thread size against your unit's data plate before ordering. Our fitment team is available to confirm compatibility — just reach out before you buy. Order now and we'll ship today.