{"product_id":"payne-pa4gpxa60000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA4GPXA60000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA4GPXA60000AA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003ePayne PA4GPXA60000AA\u003c\/strong\u003e packaged air conditioning unit. The transformer steps down 120V line voltage to the 24V signal needed to power your thermostat, control board, and all low-voltage safety circuits. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system stops responding to calls for cooling or heating, and no components energize. A failed transformer is often misdiagnosed as a thermostat or control board issue, so always test transformer output voltage first.\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 | Compatible with standard low-voltage HVAC control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like HT01BD209 are wound to exact factory VA ratings and insulation class, ensuring stable 24V output under full control-circuit load. Generic transformers may sag under load, causing erratic board behavior and nuisance lockouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power to the unit at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Label all low-voltage wires before disconnecting. Confirm output voltage reads 24–28V AC after installation.\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 for the Payne \u003cstrong\u003ePA4GPXA60000AA\u003c\/strong\u003e packaged unit. Verify transformer VA rating and primary\/secondary voltages on your unit's data plate before ordering. If you have questions about fitment, our HVAC parts specialists confirm compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908860367219,"sku":"PAYNE-PA4GPXA60000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908860399987,"sku":"PAYNE-PA4GPXA60000AA-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_ca8adddb-99fb-4911-9d96-3e1b52976211.jpg?v=1780719030","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa4gpxa60000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}