{"product_id":"payne-pa12na06000gabaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch High\/Low for PA12NA06000GABAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA12NA06000GABAA\u003c\/h1\u003e\u003cp\u003eThese OEM pressure switches — \u003cstrong\u003eHK02ZA395 (High Pressure Switch)\u003c\/strong\u003e and \u003cstrong\u003eHK02ZB028 (Low Pressure Switch)\u003c\/strong\u003e — are the factory-specified replacements for the \u003cstrong\u003ePayne PA12NA06000GABAA\u003c\/strong\u003e packaged unit. Pressure switches monitor the inducer motor's draft pressure to confirm safe venting conditions before allowing the ignition sequence to proceed. When either switch fails or sticks, the control board interprets it as a venting fault and locks out the system, leaving you with no heat. Common symptoms include the inducer running continuously with no ignition, a blinking fault code indicating a pressure switch error, or the system cycling off immediately after the call for heat begins.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e HK02ZA395 — High Pressure Switch | HK02ZB028 — Low Pressure Switch | 24V control circuit compatible | Factory-calibrated W.C. (water column) trip point matched to PA12NA06000GABAA inducer assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to the exact water column rating required by this unit. Off-brand substitutes frequently carry incorrect trip points, causing nuisance lockouts or — more dangerously — allowing ignition under unsafe draft conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Shut off power and gas before servicing. Tools needed: 1\/4\" nut driver, flathead screwdriver, manometer (recommended for verification), and needle-nose pliers for hose clamps. Inspect the rubber pressure hose and port for cracks or blockages before installing the new switch, as a clogged hose is a frequent root cause of switch failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty covers defects in materials and workmanship. Orders ship same business day from our warehouse when placed before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered and factory-matched for the \u003cstrong\u003ePayne PA12NA06000GABAA\u003c\/strong\u003e packaged unit. Order \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e to replace the high pressure switch or \u003cstrong\u003eHK02ZB028\u003c\/strong\u003e to replace the low pressure switch — verify your fault code or perform a continuity test to identify which switch has failed before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you purchase.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909178151283,"sku":"PAYNE-PA12NA06000GABAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909178184051,"sku":"PAYNE-PA12NA06000GABAA-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_7ad8344f-1a50-4a61-8992-138b0ecf4d23.jpg?v=1780718476","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa12na06000gabaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}