OEM Carrier High Pressure Switch HK02ZA395 — 395/295 PSI for Model PY2PPB030040AB

The Carrier HK02ZA395 is the factory-specified OEM high pressure switch for the PY2PPB030040AB packaged unit. This safety-critical component continuously monitors refrigerant discharge pressure on the high side of the refrigeration circuit. When pressure spikes above the factory trip point — typically caused by a dirty condenser coil, failed condenser fan motor, refrigerant overcharge, or blocked airflow — the switch opens to cut power and protect the compressor from catastrophic failure. A failed or out-of-calibration switch will cause nuisance lockouts, compressor short-cycling, or a system that refuses to run entirely.

• Specs: Opens at 395 PSI | Closes (auto-reset) at 295 PSI | 240 VAC rated | 1/8" NPT male thread fitting | Factory-calibrated Sensata/RCD pressurestat housing (PS80-03-0018 platform)
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part with exact factory pressure calibration. Aftermarket switches frequently carry ±5–10% tolerance on trip points, risking either nuisance trips or — more dangerously — failure to protect the compressor at true over-pressure events.
• Install difficulty: 2/5 — Always recover refrigerant and depressurize the system before disconnecting. Tools needed: refrigerant recovery machine, 1/8" NPT wrench, multimeter (to verify open/closed continuity), and thread sealant. Photograph wiring connections before removal.
• Warranty & Shipping: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY2PPB030040AB. Also supersedes legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, and HK02ZA400. Always verify the PSI trip rating on your unit's data plate or service manual before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy.