OEM Payne High & Low Pressure Switch for Model PA10EA060000ACAA

These OEM pressure switches — HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) — are the factory-specified replacements for the Payne PA10EA060000ACAA packaged air conditioner. Pressure switches monitor refrigerant pressure on both the high and low sides of the refrigerant circuit, sending a safety signal to the control board to prevent compressor damage under abnormal operating conditions. When either switch fails, the unit will typically lock out before or immediately after startup, display a fault code, or short-cycle repeatedly without reaching the set temperature.

• Specs: HK02ZA395 — High-Side Pressure Switch | HK02ZB028 — Low-Side Pressure Switch | Factory-calibrated cutout setpoints | Designed for R-410A refrigerant systems | Direct OEM replacements, no modification required
• OEM vs Generic: OEM pressure switches are calibrated to exact factory cutout and reset pressures for this model. Generic alternatives frequently use looser pressure tolerances, risking nuisance trips or — worse — failing to protect the compressor during a true refrigerant fault event.
• Install Difficulty: 3/5 — Refrigerant system must be safely isolated before replacing pressure switches. Tools needed: manifold gauge set, adjustable wrench, multimeter, safety glasses. Always verify system pressure is equalized and follow EPA Section 608 refrigerant handling regulations. Professional installation is strongly recommended.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before 3 PM EST ship same business day from our stocked warehouse.

Compatibility: Both switches are factory-matched for the Payne PA10EA060000ACAA 5-ton packaged air conditioning unit. Confirm refrigerant type and existing switch part numbers on the unit's data plate or wiring diagram before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork required.