OEM Carrier High Pressure Switch HK02ZA395 for Model PH2PEB036000AA

This OEM high pressure switch (part number HK02ZA395) is the factory-specified refrigerant-side safety device for the Carrier PH2PEB036000AA heat pump system. Its job is to monitor refrigerant high-side pressure and open the safety circuit if pressure exceeds the factory cutout threshold — protecting the compressor from catastrophic damage. A failed or stuck-open switch will trigger a system lockout, prevent cooling or heating operation, and may display a fault code on your thermostat or control board. The companion low-side pressure switch HK02ZB044 is also available and commonly replaced at the same service call.

• Specs — HK02ZA395 (High Pressure Switch): Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT male fitting | 240 VAC rated | SPST normally closed | Sensata PS80 platform | Replaces: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435
• Specs — HK02ZB044 (Low Pressure Switch): Opens at 7 PSI | Closes at 22 PSI | 50" lead wires | 24V | Factory-matched OEM tolerances for the PH2PEB036000AA refrigerant circuit
• OEM vs Generic: OEM Carrier pressure switches are calibrated to exact PSI thresholds at the factory. Generic aftermarket switches frequently carry ±10–15% PSI variance, risking nuisance trips or — worse — under-protection of the compressor. For a refrigerant-side safety device, OEM is always the recommended choice.
• Install difficulty: 3/5 — Refrigerant-side pressure switches require system recovery or careful isolation before replacement. Tools needed: refrigerant manifold gauges, 1/4" and 5/16" flare wrenches, multimeter for continuity verification. EPA 608 certification required if refrigerant is handled. Always de-energize the unit at the disconnect before beginning.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Engineered for Carrier model PH2PEB036000AA heat pump systems. Both OEM part numbers — HK02ZA395 (high pressure) and HK02ZB044 (low pressure) — are stocked and ready to ship. Verify your unit's data plate and existing switch PSI markings before ordering. Our fitment team is available to confirm compatibility before you buy.