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This OEM-matched pressure switch set includes both the high pressure switch (HK02ZA395) and low pressure switch (HK02ZB028) factory-specified for the Payne PA13NR036000AHAA split-system air conditioner. Pressure switches monitor refrigerant pressure on both the high and low sides of the refrigerant circuit, sending a signal to the control board to shut down the system if pressures fall outside safe operating ranges. When either switch fails, you may experience nuisance lockouts, a system that refuses to start, or an air conditioner that shuts down immediately after attempting to run — even when refrigerant charge is correct.
Compatibility: This set is factory-matched to the Payne PA13NR036000AHAA 3-ton split-system condenser running R-410A refrigerant. Verify OEM part numbers HK02ZA395 and HK02ZB028 against your unit's service label before ordering. If you need only one switch, both are available individually — contact our fitment team for assistance. Order today and your parts ship the same business day.