{"product_id":"payne-pa13pr03600gahaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA13PR03600GAHAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch HK02ZA395 \/ HK02ZB028 for Model PA13PR03600GAHAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch is the factory-specified replacement for the \u003cstrong\u003ePayne PA13PR03600GAHAA\u003c\/strong\u003e split-system heat pump. Pressure switches are safety devices that monitor refrigerant circuit pressures — the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e protects against dangerously elevated head pressure, while the \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e guards against loss of charge or restricted airflow. When either switch trips or fails, the system will lock out before completing a heating or cooling cycle, leaving you with no conditioned air and a fault code on the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM Part Numbers HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) | Factory-calibrated trip\/reset points | Spade terminal connections | Matched to R-410A refrigerant circuit pressures for the PA13PR03600GAHAA platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM Payne pressure switches are calibrated to exact factory trip thresholds. Aftermarket substitutes frequently use wider tolerance setpoints, risking nuisance lockouts or — more dangerously — failure to protect the compressor at true fault conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work must be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, multimeter, flat-head and Phillips screwdrivers, needle-nose pliers. Always recover refrigerant before replacing refrigerant-side switches, and photograph all wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before 3 PM ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003ePayne PA13PR03600GAHAA\u003c\/strong\u003e 3-ton, 13 SEER split-system heat pump. Confirm the OEM part number printed on your existing switch before ordering, as high and low pressure switch specifications differ. Our parts specialists are available to verify fitment before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909072114035,"sku":"PAYNE-PA13PR03600GAHAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909072146803,"sku":"PAYNE-PA13PR03600GAHAA-PRESSURE_SWITCH-HK02ZA395-GEN","price":38.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_8870bb88-0053-497e-b90d-64e9d5ce35b6.jpg?v=1780718563","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13pr03600gahaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}