OEM Carrier High Pressure Switch HK02ZA395 — 395/295 PSI for Model PY1PPB048130AAAA

This is the genuine OEM Carrier high pressure switch (part number HK02ZA395), factory-specified for the Carrier PY1PPB048130AAAA packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety device: it monitors system head pressure and opens the control circuit when pressure exceeds a safe threshold, cutting power to the compressor to prevent catastrophic damage. When this switch fails or trips — whether due to a refrigerant overcharge, blocked condenser coil, failing condenser fan motor, or a faulty switch itself — you'll typically see the system lock out on a high-pressure fault, short-cycle repeatedly, or shut down entirely without obvious cause.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread connection | Rated 240 VAC | Sensata PS80-03-0018 platform | SPST (normally closed) | Cross-references: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401
• OEM vs Generic: This is the genuine Carrier factory part — not an aftermarket substitute. OEM switches are calibrated to exact cut-out and cut-in pressure tolerances. Aftermarket switches frequently drift outside spec, causing nuisance trips or, worse, failing to protect the compressor under true high-pressure conditions.
• Install difficulty: 2/5 — Recover refrigerant and depressurize the system before removing the switch. Tools needed: adjustable wrench or 1" open-end wrench, thread-seal tape (use sparingly on NPT threads), refrigerant manifold gauge set to verify pressures post-install. Always confirm the replacement switch with your unit's wiring diagram before connecting.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PY1PPB048130AAAA packaged heat pump unit. Verify part number HK02ZA395 against your unit's data plate and parts diagram before ordering. Our team is available to confirm fitment — reach out before you buy if you have any questions, and we'll make sure you get the right part the first time.