{"product_id":"carrier-ph1zna048000aaaa-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch HK02ZA395 for PH1ZNA048000AAAA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA395 \/ HK02ZB044 for Model PH1ZNA048000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM high pressure switch is the factory-specified replacement for the \u003cstrong\u003eCarrier PH1ZNA048000AAAA\u003c\/strong\u003e packaged unit. The pressure switch monitors system refrigerant or draft pressure and sends a proof signal to the control board before allowing the unit to proceed through its operating sequence. When this switch fails — whether it is stuck open, stuck closed, or has a degraded diaphragm — the system will typically lock out on a fault code, refuse to initiate a heating or cooling cycle, or shut down shortly after startup. Both OEM part numbers \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e (High Pressure Switch) and \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e (Pressure Switch) are included in this listing; verify your unit's data plate and wiring diagram to confirm the correct switch position before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM-matched pressure rating | Factory-calibrated setpoint | Direct drop-in replacement | Spade terminal connections | Compatible with R-410A system pressures on the Carrier PH1ZNA048000AAAA 4-ton packaged unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact factory trip and reset points. Generic aftermarket switches frequently carry wider tolerances, which can cause nuisance lockouts, failure to prove, or — worse — failure to protect the compressor at high-pressure events.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (for continuity verification). Photograph all wiring and tubing connections before disassembly. Swap the pressure tubing and spade connectors, then restore power and verify normal operation through a full cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cut-off time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for \u003cstrong\u003eCarrier model PH1ZNA048000AAAA\u003c\/strong\u003e packaged units. Cross-references OEM part numbers HK02ZA395 and HK02ZB044. Always verify the switch location (high-side vs. low-side) and setpoint rating against your unit's wiring diagram and data plate before installing. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — \u003cstrong\u003econtact us today and ships the same day.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641511465331,"sku":"CARRIE-PH1ZNA048000AAAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641511498099,"sku":"CARRIE-PH1ZNA048000AAAA-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_7f709182-e695-469b-97fe-a7ed0357d349.jpg?v=1775033575","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1zna048000aaaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}