{"product_id":"carrier-ph15nb03600gbbaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH15NB03600GBBAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit — 312926-252 \u0026amp; 312926-258 for PH15NB03600GBBAA\u003c\/h1\u003e\u003cp\u003eThese two OEM pressure switches are the factory-specified replacements for the \u003cstrong\u003eCarrier PH15NB03600GBBAA\u003c\/strong\u003e heat pump system. The \u003cstrong\u003ehigh pressure switch (312926-252)\u003c\/strong\u003e trips at 670 PSI and resets at 470 PSI, cutting power to the compressor before dangerously elevated refrigerant pressure can cause catastrophic system failure. The \u003cstrong\u003elow pressure switch (312926-258)\u003c\/strong\u003e monitors the suction side of the refrigerant circuit, shutting the compressor down if pressure drops too low — a common indicator of refrigerant loss, a blocked filter drier, or an iced evaporator coil. When either switch fails or trips without resetting, the result is a compressor that won't run, short-cycling, or a system locked out entirely.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e 312926-252 (High Pressure Switch, 670\/470 PSI) | 312926-258 (Low Pressure Switch) — both are genuine Carrier OEM components, factory-matched to the PH15NB03600GBBAA refrigerant circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM switches are calibrated to exact cut-out and cut-in pressure thresholds specified by Carrier engineering. Aftermarket units often carry wider tolerances, risking nuisance trips or, worse, failure to protect the compressor under actual fault conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant system work requires an EPA 608 certification. Tools needed: manifold gauge set, adjustable wrenches, wire terminals, multimeter. Always recover refrigerant before accessing the high-side circuit. Verify switch continuity with a multimeter before condemning the part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Orders placed before 3 PM ship the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier PH15NB03600GBBAA\u003c\/strong\u003e heat pump. Confirm your unit's refrigerant type and pressure ratings on the data plate before ordering. Our parts specialists are available to verify fitment — contact us before you buy if you have any questions. \u003cstrong\u003eIn stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641672028531,"sku":"CARRIE-PH15NB03600GBBAA-PRESSURE_SWITCH-312926-252","price":77.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641672061299,"sku":"CARRIE-PH15NB03600GBBAA-PRESSURE_SWITCH-312926-252-GEN","price":68.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_a987df7a-9e1d-4e95-8dc8-3d1d93324033.jpg?v=1775033124","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph15nb03600gbbaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}