{"product_id":"payne-pa4gpxa30000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA4GPXA30000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA4GPXA30000AA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003ePayne PA4GPXA30000AA\u003c\/strong\u003e air conditioner. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead — your thermostat loses power, no calls for cooling or heating are processed, and the system appears completely unresponsive. Replacing the transformer is often the fastest and most affordable fix when nothing in the system responds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Factory-matched impedance and thermal protection | Replaces OEM part number HT01BD209\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory OEM transformer is wound to exact VA and voltage tolerances specified for the PA4GPXA30000AA. Undersized or off-tolerance generic transformers can overheat, blow fuses repeatedly, or fail to sustain coil voltage under load — leading to nuisance lockouts and callbacks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wire connections before removal. Confirm 24V output with a multimeter before closing the panel.\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 warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Payne \u003cstrong\u003ePA4GPXA30000AA\u003c\/strong\u003e split-system air conditioner. Verify your existing transformer's VA rating and primary\/secondary voltage on the unit's data plate or wiring diagram before ordering. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908860989811,"sku":"PAYNE-PA4GPXA30000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908861022579,"sku":"PAYNE-PA4GPXA30000AA-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_1b8860cb-6aac-4b4e-8d23-8cac2e834022.jpg?v=1780719027","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa4gpxa30000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}