OEM Payne High & Low Pressure Switch Kit for Model PA13NR030000AAAA

This OEM pressure switch kit includes both the high pressure switch (HK02ZA395) and low pressure switch (HK02ZB028) factory-specified for the Payne PA13NR030000AAAA split-system air conditioner. Pressure switches monitor refrigerant-side pressures to protect the compressor from operating outside safe limits. When either switch fails or trips, the system will lock out — typically presenting as a unit that powers on but immediately shuts down, throws a fault code, or fails to enter the cooling cycle entirely. A faulty high pressure switch often mimics an overcharge or airflow restriction, while a failed low pressure switch can indicate a refrigerant leak or evaporator freeze condition.

• Specs: High Pressure Switch — OEM Part HK02ZA395 | Low Pressure Switch — OEM Part HK02ZB028 | Factory-calibrated trip points matched to PA13NR030000AAAA refrigerant circuit | R-410A compatible | SPST normally closed configuration
• OEM vs Generic: OEM pressure switches are calibrated to exact factory cut-in and cut-out pressures for this model. Aftermarket substitutes frequently use wider tolerance thresholds, risking nuisance trips or — worse — allowing the compressor to operate outside its safe pressure envelope, leading to premature failure.
• Install difficulty: 3/5 — Refrigerant system must be properly recovered before disconnecting pressure switch lines if brazed connections are involved. If Schrader-style or wire-harness mounted, replacement is straightforward. Tools needed: multimeter, wire crimpers, 1/4" nut driver, refrigerant recovery equipment (if applicable). Always verify system pressures post-install.
• Warranty: 1-year OEM factory warranty on both switches. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Both pressure switches are factory-matched for the Payne PA13NR030000AAAA 2.5-ton single-stage split-system condenser. Confirm your unit's data plate and existing switch part numbers before ordering to ensure correct fitment. Our HVAC parts specialists are available to verify compatibility before you buy — same-day shipping means your repair stays on schedule.