{"product_id":"payne-pa13nr04200gacaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA13NR04200GACAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA13NR04200GACAA\u003c\/h1\u003e\u003cp\u003eThese OEM pressure switches — \u003cstrong\u003eHK02ZA395 (High Pressure Switch)\u003c\/strong\u003e and \u003cstrong\u003eHK02ZB028 (Low Pressure Switch)\u003c\/strong\u003e — are the factory-specified replacements for the \u003cstrong\u003ePayne PA13NR04200GACAA\u003c\/strong\u003e split-system heat pump. Pressure switches monitor refrigerant-side pressures to protect the compressor from operating outside safe limits. When either switch trips or fails, the system will lock out on a fault code, preventing heating or cooling operation entirely. Common symptoms include the unit refusing to start, immediate lockout after energizing the contactor, or fault codes indicating high- or low-pressure trips on the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e HK02ZA395 — High Pressure Switch, factory W.C.-rated cutout | HK02ZB028 — Low Pressure Switch, factory W.C.-rated cutout | OEM-matched electrical connectors | SPST normally-closed configuration for fail-safe protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches use factory-calibrated setpoints to match the PA13NR04200GACAA's refrigerant circuit exactly. Aftermarket switches often carry wider trip tolerances, risking nuisance trips or, worse, inadequate compressor protection that can lead to catastrophic failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant-side pressure switches require proper system recovery and recharge procedures if refrigerant lines must be broken. If switches are accessible on the liquid and suction lines without opening the circuit, replacement is straightforward. Tools needed: manifold gauge set, multimeter, flathead screwdriver, needle-nose pliers. Always verify system pressures after replacement and consult a certified HVAC technician if unsure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Orders ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e These switches are factory-matched for the Payne \u003cstrong\u003ePA13NR04200GACAA\u003c\/strong\u003e heat pump. Always verify part numbers HK02ZA395 and HK02ZB028 against your unit's wiring diagram and data plate before ordering. Our fitment team is available to confirm compatibility before you purchase — same-day shipping available on all in-stock OEM Payne parts.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909097640307,"sku":"PAYNE-PA13NR04200GACAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909097673075,"sku":"PAYNE-PA13NR04200GACAA-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_1a2c9c45-81b6-4415-8ae5-2c7225a1d503.jpg?v=1780718553","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13nr04200gacaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}