OEM Carrier High Pressure Switch HK02ZA395 — 395/295 PSI for Model PY1PEB048090NBAA

The Carrier HK02ZA395 is the factory-specified OEM high pressure safety switch for the PY1PEB048090NBAA packaged unit. This refrigerant-side protection device continuously monitors system high-side pressure and cuts power to the compressor circuit when pressure exceeds the safe operating threshold. A failed or out-of-calibration high pressure switch typically causes nuisance compressor lockouts, repeated fault codes, or a system that trips immediately on startup — symptoms that mimic refrigerant overcharge or a failed condenser fan but are traced directly to the switch.

• Specs: Opens at 395 PSI | Closes (resets) at 295 PSI | 1/8" NPT port | 240 VAC rated | Sensata PS80-03-0018 platform | Replaces HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, and more
• OEM vs Generic: OEM switches maintain factory-calibrated trip points (±3%). Aftermarket alternatives often drift outside tolerance, causing premature trips or — more dangerously — failing to open under true high-pressure conditions that risk compressor damage.
• Install difficulty: 2/5 — Recover refrigerant before removing the switch if system pressure is present. Tools needed: adjustable wrench, Teflon tape, manifold gauge set, multimeter (continuity check post-install). Torque to spec — overtightening cracks the brass port body.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Direct OEM replacement for Carrier model PY1PEB048090NBAA packaged unit. Cross-references: 312926-217, 71267D1, HK02ZA380, HK02ZA396, 19240027, HK02ZA400, 312926-225, 312926-226, 312926-233, HK02ZA401. Verify your unit's data plate pressure switch specification before ordering. Have a question about fitment? Our certified HVAC parts team confirms compatibility before you buy — contact us before placing your order.