{"product_id":"payne-pa3znb024000ac-transformer-h30291","title":"OEM Payne Transformer 40VA 120V-24V for PA3ZNB024000AC","description":"\u003ch1\u003eOEM Payne Control Transformer 40VA for Model PA3ZNB024000AC\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003ePayne PA3ZNB024000AC\u003c\/strong\u003e air conditioner. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, and all low-voltage control components. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system will not respond to any call for cooling, and nothing works. If you've ruled out a tripped breaker and blown fuse and still have no 24V at the transformer secondary, this is your part.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD209 | Factory-matched output for full control circuit compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the factory OEM transformer built to Payne's exact VA rating and insulation class. Generic transformers often run underrated VA, causing overheating, nuisance fuse failures, and shortened control board life — especially under multi-stage or heat pump loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and verify voltage is absent with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or push-in connectors. Label all wiring before disconnecting. Secure transformer to mounting bracket before re-energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003ePayne PA3ZNB024000AC\u003c\/strong\u003e split-system air conditioner. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions. Order today and your part ships the same business day.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908883468659,"sku":"PAYNE-PA3ZNB024000AC-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908883501427,"sku":"PAYNE-PA3ZNB024000AC-TRANSFORMER-HT01BD209-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_a83960c4-2c1e-4d74-942f-cf847faf3acb.jpg?v=1780718871","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3znb024000ac-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}