OEM Payne High & Low Pressure Switch for Model PA13NR060000AEAA

These OEM pressure switches — HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) — are the factory-specified replacements for the Payne PA13NR060000AEAA split-system heat pump. Pressure switches monitor refrigerant pressure on both the high and low sides of the refrigerant circuit to protect the compressor from running outside safe operating limits. When either switch fails or trips, the system will lock out, refuse to start, or cycle off unexpectedly — often with a fault code indicating a pressure fault at the control board.

• Specs: HK02ZA395 — High-Side Pressure Switch | HK02ZB028 — Low-Side Pressure Switch | 24V control circuit compatible | Factory-calibrated trip points matched to R-410A refrigerant pressures for PA13NR060000AEAA
• OEM vs Generic: OEM pressure switches are calibrated to exact factory trip-point thresholds. Generic alternatives often carry wider tolerances, risking nuisance trips or — worse — failing to protect the compressor under true fault conditions.
• Install difficulty: 3/5 — Refrigerant system pressure must be relieved or isolated before replacing. Tools needed: manifold gauge set, 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter to verify continuity after install. EPA 608 certification required to handle refrigerant.
• Warranty: 1-year OEM factory warranty on both switches. Orders placed by 3 PM ship same business day from our stocked warehouse.

Compatibility: Both switches are designed specifically for the Payne PA13NR060000AEAA 5-ton single-stage R-410A heat pump. Always verify OEM part numbers HK02ZA395 and HK02ZB028 against your unit's wiring diagram and data plate before ordering. Not sure which switch you need? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.