{"product_id":"payne-pa10ja042000ahaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch Set HK02ZA395 \/ HK02ZB028 — PA10JA042000AHAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch Set for Model PA10JA042000AHAA\u003c\/h1\u003e\u003cp\u003eThis OEM-matched pressure switch set includes both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e factory-specified for the \u003cstrong\u003ePayne PA10JA042000AHAA\u003c\/strong\u003e packaged air conditioner. Pressure switches monitor refrigerant-side pressures and protect the compressor from operating outside safe limits. When either switch fails or sticks open, the control board interprets an unsafe pressure condition and locks out the system — resulting in no cooling, a fault code, or a compressor that shuts down immediately after startup.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High Pressure Switch — HK02ZA395 | Low Pressure Switch — HK02ZB028 | 24V control circuit compatible | Factory-calibrated cut-out and cut-in pressure settings matched to R-410A refrigerant operating range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to exact cut-out thresholds. Generic replacements often carry wider tolerances, risking nuisance trips or — more dangerously — failure to protect the compressor during a true high-pressure event.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant-side pressure switch replacement may require recovering refrigerant depending on switch location and system pressure. Tools needed: multimeter, manifold gauge set, adjustable wrench, and safety glasses. Always de-energize the unit at the disconnect before beginning. Consult a licensed HVAC technician if refrigerant recovery is required in your jurisdiction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This listing covers both OEM pressure switches for the Payne \u003cstrong\u003ePA10JA042000AHAA\u003c\/strong\u003e packaged air conditioning unit. Verify part numbers HK02ZA395 (high) and HK02ZB028 (low) against your unit's wiring diagram or data plate before ordering. Not sure which switch failed? Our fitment team can help you diagnose before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909240246643,"sku":"PAYNE-PA10JA042000AHAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909240279411,"sku":"PAYNE-PA10JA042000AHAA-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_fe2dae0b-2299-4d5b-be86-4f60896f5036.jpg?v=1780718647","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa10ja042000ahaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}