OEM Carrier High Pressure Switch 395/295 PSI — HK02ZA395 for Model PY1PPB048130NBAA

This is the genuine OEM high pressure switch (part number HK02ZA395) factory-specified for the Carrier PY1PPB048130NBAA packaged unit. The high pressure switch is a critical refrigerant-circuit safety device: it continuously monitors discharge-line pressure and opens the compressor circuit if pressure climbs dangerously high, preventing compressor burnout, refrigerant line rupture, or catastrophic system failure. When this switch fails or trips repeatedly, you'll see the system locking out on high-pressure fault codes, the compressor shutting down unexpectedly, or — if the switch has failed closed — an unprotected compressor running into dangerously elevated pressures. Replace it promptly with the factory-matched OEM part.

• Specs: Opens at 395 PSI | Closes (resets) at 295 PSI | 1/8" NPT male fitting | 240 VAC rated | SPST normally-closed contacts | Sensata PS80 platform (HK02ZA395A)
• OEM vs Generic: Genuine Carrier OEM switches are manufactured to exact cut-out and cut-in tolerances. Aftermarket equivalents often carry wider pressure tolerances (±10–15 PSI), risking either nuisance trips or, worse, delayed shutoff that exposes the compressor to over-pressure conditions.
• Install Difficulty: 3/5 — Refrigerant-side work requires EPA 608 certification. Recover refrigerant before removing the switch. Tools needed: refrigerant recovery machine, manifold gauge set, adjustable wrench, thread sealant (PTFE tape rated for refrigerant). Always leak-test the new switch connection before recharging.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for Carrier PY1PPB048130NBAA packaged units. Also cross-references to legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, and HK02ZA435 — verify your existing switch's PSI rating on the data plate before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.