OEM Carrier High Pressure Switch HK02ZA395 — 406/300 PSI for Model PY1PNB060090AAAA

This is the genuine OEM Carrier high pressure safety switch (part number HK02ZA395), factory-specified for the Carrier PY1PNB060090AAAA packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety device that monitors system discharge pressure and opens the control circuit if pressure exceeds a safe threshold — protecting the compressor from catastrophic failure due to refrigerant overcharge, blocked condenser coil, or restricted airflow. Failure symptoms include: system trips off on a fault code, compressor short-cycles, or the unit locks out and will not restart without a manual reset.

• Specs: Opens at 406 PSI | Closes at 300 PSI | 1/8" NPT thread connection | Rated 6(6)A at 240 VAC | PMAX 41B | Sensata PS80-03-0018 platform | Replaces HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, and more
• OEM vs Generic: This is a genuine Carrier OEM switch manufactured to exact factory pressure tolerances. Generic aftermarket switches frequently deviate from set-point specs, risking either false trips under normal load or, worse, failure to open under true overpressure — both of which accelerate compressor wear and void manufacturer warranties.
• Install Difficulty: 2/5 — Always recover refrigerant and depressurize the system before replacing a high pressure switch. Tools needed: refrigerant recovery machine, manifold gauges, adjustable wrench, Teflon tape, leak detection solution. Torque the 1/8" NPT fitting carefully to avoid cracking the switch body. Verify system pressures after recharge.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed and tested for the Carrier PY1PNB060090AAAA packaged heat pump. This switch also supersedes numerous legacy Carrier/Bryant part numbers — confirm your unit's refrigerant type and discharge pressure rating against your data plate before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and we'll ship your order the same day.