{"product_id":"carrier-ph13nb030000aaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit 670-470# — PH13NB030000AAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit 670-470# for Model PH13NB030000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit includes both the \u003cstrong\u003ehigh pressure switch (312926-252)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (312926-258)\u003c\/strong\u003e — the factory-specified refrigerant safety controls for the \u003cstrong\u003eCarrier PH13NB030000AAAA\u003c\/strong\u003e heat pump system. These switches continuously monitor refrigerant circuit pressure and cut power to the compressor the moment pressure moves outside the safe operating envelope. A failed high pressure switch typically presents as nuisance compressor trips or a system that short-cycles and locks out on a high-pressure fault. A failed low pressure switch causes the compressor to shut down prematurely or prevents it from starting altogether, often mimicking a refrigerant-loss symptom even when charge is adequate.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High Pressure Switch 312926-252 — 670 PSI cut-out \/ 470 PSI cut-in | Low Pressure Switch 312926-258 — factory-matched refrigerant pressure thresholds | SPST normally-closed contacts | Designed for R-410A refrigerant circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM Carrier switches are calibrated to exact factory cut-in\/cut-out pressures. Off-brand switches frequently drift in setpoint, allowing dangerous over- or under-pressure conditions that shorten compressor life or void equipment warranties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work requires an EPA 608 certified technician. Tools needed: manifold gauge set, adjustable wrench, leak-detection solution. Always recover refrigerant before opening the high-side circuit. Photograph all wiring before disconnection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Orders placed before 5 PM EST ship the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Factory-matched for the \u003cstrong\u003eCarrier PH13NB030000AAAA\u003c\/strong\u003e heat pump. Always verify OEM part numbers 312926-252 (high) and 312926-258 (low) against your unit's data plate and wiring diagram before installation. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641920803187,"sku":"CARRIE-PH13NB030000AAAA-PRESSURE_SWITCH-312926-252","price":59.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641920835955,"sku":"CARRIE-PH13NB030000AAAA-PRESSURE_SWITCH-312926-252-GEN","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252.jpg?v=1775032974","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph13nb030000aaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}