OEM Payne High & Low Pressure Switch Kit for Model PA13NR042000ACAA

This OEM replacement pressure switch kit includes both the high pressure switch (HK02ZA395) and low pressure switch (HK02ZB028) factory-specified for the Payne PA13NR042000ACAA split-system condenser. Refrigerant pressure switches monitor system operating pressures to protect the compressor from dangerously high or low refrigerant conditions. When either switch fails, the system will lock out on a fault code, short-cycle, or refuse to start entirely — leaving your home without cooling on the hottest days.

• Specs: Includes HK02ZA395 High Pressure Switch and HK02ZB028 Low Pressure Switch | Factory-calibrated trip points | SPST normally closed contacts | 1/4" Schrader-style port connection | OEM-matched wiring harness connectors
• OEM vs Generic: OEM pressure switches are factory-calibrated to exact trip-point tolerances for the PA13NR042000ACAA refrigerant circuit. Generic substitutes often carry wider pressure tolerances, risking nuisance lockouts or, worse, inadequate compressor protection.
• Install difficulty: 3/5 — Refrigerant system work requires an EPA 608 certified technician. Tools needed: manifold gauge set, flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always recover refrigerant per EPA regulations before accessing Schrader ports and photograph all wiring before disconnecting.
• Warranty: 1-year OEM factory warranty on both switches. Orders ship same business day from our climate-controlled warehouse.

Compatibility: This kit is engineered specifically for the Payne PA13NR042000ACAA 3.5-ton R-22 split-system condenser. Verify both OEM part numbers — HK02ZA395 and HK02ZB028 — against your unit's data plate and wiring diagram before ordering. If you're unsure which switch has failed, our technical team can help you confirm fitment and diagnose the fault code before you order.