{"product_id":"payne-pa11ja018000aaaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch Kit for PA11JA018000AAAA — HK02ZA395 \/ HK02Z","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch Kit for Model PA11JA018000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement pressure switch kit includes both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and the \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e factory-specified for the \u003cstrong\u003ePayne PA11JA018000AAAA\u003c\/strong\u003e furnace. Pressure switches prove that the inducer motor has established proper draft before the control board allows ignition to proceed. When either switch fails — or when the sensing hose cracks or the port clogs — the furnace locks out before the ignition sequence begins, leaving you with no heat. Common fault codes point directly to a failed pressure switch as one of the most frequent no-heat diagnoses in induced-draft furnaces.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High pressure switch OEM part \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e | Low pressure switch OEM part \u003cstrong\u003eHK02ZB028\u003c\/strong\u003e | Factory-calibrated W.C. (inches water column) rating | 24V control-circuit signal | Designed for Payne PA11JA018000AAAA induced-draft gas furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to the exact W.C. setpoint required by this furnace model. Aftermarket substitutes frequently carry wider tolerances, risking nuisance lockouts in cold weather or — more dangerously — allowing ignition under unsafe draft conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off power and gas before beginning. Tools needed: 1\/4\" nut driver, flathead screwdriver, manometer (optional but recommended for verification), and replacement hose if cracked. Inspect the rubber sensing hose and drain port for blockages before condemning the switch itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This kit is matched specifically to the \u003cstrong\u003ePayne PA11JA018000AAAA\u003c\/strong\u003e induced-draft gas furnace. Always verify your existing switch W.C. rating and part number on the switch body or furnace data plate before ordering. If you need help confirming fitment, our HVAC parts specialists are ready to verify before you buy — same-day shipping on all confirmed in-stock orders.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909211869555,"sku":"PAYNE-PA11JA018000AAAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909211902323,"sku":"PAYNE-PA11JA018000AAAA-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_6253bdca-0966-4b6c-977e-afd3cdef2e02.jpg?v=1780718607","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa11ja018000aaaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}