OEM Carrier High Pressure Switch HK02ZA395 / HK02ZB044 for Model PH2PPB042000AB

This genuine OEM high pressure switch is the factory-specified replacement for the Carrier PH2PPB042000AB heat pump. The high pressure switch monitors refrigerant system pressure on the discharge side of the compressor. When refrigerant pressure exceeds the factory-set cutout threshold, the switch opens the safety circuit — shutting down the compressor to prevent catastrophic damage. A failed or out-of-spec switch causes nuisance high-pressure lockouts, prevents cooling or heating operation, or — if stuck closed — allows dangerously elevated pressures that can destroy the compressor.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 240 VAC rated | 1/8" NPT thread connection | SPST normally-closed contact | Sensata PS80 platform | OEM Part Numbers: HK02ZA395 (High Pressure Switch) and HK02ZB044 (Pressure Switch)
• OEM vs Generic: This is a genuine Carrier OEM part manufactured to factory pressure setpoints. Aftermarket switches frequently carry ±5–10% pressure tolerances, which can allow unsafe operating pressures or cause premature nuisance trips — risking compressor damage. OEM is the only specification-correct choice for a safety-critical component.
• Install Difficulty: 3/5 — Requires system refrigerant recovery before disconnecting. Tools needed: refrigerant recovery machine, manifold gauge set, 1/8" NPT thread sealant, adjustable wrench, multimeter for continuity verification. Recommended for certified HVAC technicians only (EPA 608 required).
• Warranty & Shipping: 1-year OEM factory warranty against defects. Ships same business day from our warehouse. Free shipping on orders over $99.

Compatibility: Verified for Carrier model PH2PPB042000AB heat pump. Also cross-references legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501 — confirm your unit's data plate pressure ratings before ordering. Not sure if this is your part? Our HVAC specialists verify fitment before you buy — contact us today.