OEM Payne High & Low Pressure Switch for Model PA13NR030000ABAA

This OEM-matched pressure switch set — HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) — is the factory-specified replacement for the Payne PA13NR030000ABAA split-system heat pump. Pressure switches are safety devices that monitor refrigerant pressure on both the high and low sides of the refrigerant circuit. When either switch detects an out-of-range pressure condition, it signals the control board to lock out operation, preventing compressor damage. Common failure symptoms include the system refusing to start heating or cooling, the unit short-cycling, or a fault code on the control board indicating a pressure trip. A faulty pressure switch can mimic refrigerant charge problems, so always verify switch operation before adding refrigerant.

• Specs: HK02ZA395 — High-Side Pressure Switch | HK02ZB028 — Low-Side Pressure Switch | Factory-calibrated trip points | 1/4" SAE Schrader-compatible port connections | Rated for R-410A refrigerant systems
• OEM vs Generic: OEM Payne/Carrier-family pressure switches are calibrated to exact factory cut-in and cut-out pressures for the PA13NR030000ABAA. Generic switches often carry wider trip-point tolerances, risking nuisance lockouts or, worse, delayed shutdown during a genuine fault.
• Install difficulty: 3/5 — Refrigerant system components require EPA 608 certification to service legally. Tools needed: manifold gauge set, 1/4" and 5/16" flare wrenches, multimeter to verify continuity before install. Always recover refrigerant if breaking the refrigerant circuit.
• Warranty: 1-year OEM factory warranty on both switches. Orders ship same business day from our stocked warehouse.

Compatibility: Designed specifically for the Payne PA13NR030000ABAA 2.5-ton R-410A split-system heat pump. Both OEM part numbers HK02ZA395 and HK02ZB028 are cross-compatible within the Carrier/Bryant/Payne manufacturing family — confirm your unit's data plate and existing switch markings before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy. In stock — order by 3 PM EST for same-day shipping.