OEM Payne High & Low Pressure Switch for Model PA13NR060000ADAA

These OEM pressure switches — HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) — are the factory-specified replacements for the Payne PA13NR060000ADAA split-system heat pump. Pressure switches are safety devices that monitor refrigerant circuit pressure on both the high and low sides. When either switch detects an out-of-range pressure condition, it signals the control board to lock out the system, preventing compressor damage. Common failure symptoms include the unit failing to start, short-cycling, or displaying a fault code related to high or low pressure lockout.

• Specs: HK02ZA395 — High-Side Pressure Switch | HK02ZB028 — Low-Side Pressure Switch | Factory-calibrated trip points | Designed for R-410A refrigerant systems | 24V control circuit compatible
• OEM vs Generic: OEM pressure switches are calibrated to exact factory trip-point specifications for the PA13NR060000ADAA. Aftermarket substitutes often carry wider pressure tolerances, risking nuisance lockouts or — worse — failure to protect the compressor under genuine fault conditions.
• Install Difficulty: 3/5 — Refrigerant circuit work should be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, multimeter, adjustable wrench, and safety glasses. Always recover refrigerant before disconnecting pressure switch fittings and photograph all wiring prior to removal.
• Warranty: 1-year OEM factory warranty on both HK02ZA395 and HK02ZB028. Orders placed by cutoff ship same business day from our warehouse.

Compatibility: Both switches are engineered specifically for the Payne PA13NR060000ADAA 5-ton single-stage R-410A split-system heat pump. Confirm your unit's data plate and existing switch part numbers before ordering. If you need help verifying fitment for either the high-side or low-side switch, our HVAC parts specialists are standing by — order with confidence and get your system back online today.