OEM Carrier High Pressure Switch HK02ZA395 for Model PH2PEB042000AA

This OEM high pressure safety switch (part number HK02ZA395) is the factory-specified replacement for the Carrier PH2PEB042000AA heat pump system. The high pressure switch is a critical refrigerant-circuit safety device: it continuously monitors refrigerant discharge pressure and opens the circuit when pressure exceeds the factory set point, preventing compressor damage or refrigerant line failure. When this switch fails or trips and won't reset, your system will lock out on a high-pressure fault — typically resulting in no cooling, a flashing fault code, or a system that shuts off within minutes of startup.

• Specs — HK02ZA395: Opens at 395 PSI | Closes at 295 PSI | 240 VAC | 6(6)A rated | 1/8" NPT thread | Sensata PS80 platform | PMAX 41B | Certifications: EN12263, ENEC05, EN60730-2-6
• OEM vs Generic: This is a safety-critical refrigerant pressure switch — OEM is strongly recommended. Factory-spec trip points (395/295 PSI) are precision-calibrated for the PH2PEB042000AA refrigerant circuit. Aftermarket substitutes with loose tolerances risk nuisance trips or, worse, under-protection of the compressor.
• Install Difficulty: 3/5 — Refrigerant must be recovered before replacing this switch on a pressurized circuit. Tools needed: manifold gauge set, refrigerant recovery unit, 1/8" NPT fittings, Teflon tape, multimeter. Licensed technician recommended for refrigerant handling. Always confirm system is de-energized before servicing.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PH2PEB042000AA heat pump. Also cross-references legacy part numbers including 312926-217, 71267D1, HK02ZA380, HK02ZA396, and 19240027. A secondary pressure switch, HK02ZB044 (Low Pressure Switch — 7 PSI Open / 22 PSI Close, 50" leads, 24V), is also used on this model and is available separately on our site. Verify your unit's data plate and wiring diagram to confirm which switch requires replacement before ordering. Our fitment team is available to confirm compatibility before you buy.