{"product_id":"carrier-py3gnaa42060na-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V for PY3GNAA42060NA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY3GNAA42060NA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNAA42060NA\u003c\/strong\u003e packaged unit. The transformer steps down 208\/240V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this transformer fails, the entire control circuit goes dark — the thermostat gets no power, the system will not respond to any call for heating or cooling, and no diagnostic fault codes will appear. A blown fuse on the secondary side is often the first clue; a dead transformer is frequently the root cause.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/240V primary | 24V secondary | 40VA capacity | 50\/60 Hz | Replaces OEM part numbers HT01BD207 and HT01CN232\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA and impedance specs. Generic substitutes may be under-rated for inrush current, leading to nuisance fuse trips or premature failure under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and verify with a meter before touching wiring. Label or photograph all 24V secondary wiring before disconnecting. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter. Always replace the secondary fuse if one is present.\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 \u003cstrong\u003eCarrier PY3GNAA42060NA\u003c\/strong\u003e packaged unit. Cross-references include OEM part numbers HT01BD207 and HT01CN232 — verify your existing part number on the transformer label before ordering to confirm fitment. Questions about compatibility? Our HVAC parts specialists confirm fit before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640449782131,"sku":"CARRIE-PY3GNAA42060NA-TRANSFORMER-HT01BD209","price":87.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640449814899,"sku":"CARRIE-PY3GNAA42060NA-TRANSFORMER-HT01BD209-GEN","price":77.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_edccee2e-52b7-4718-8664-6b57708d39a9.jpg?v=1775025569","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa42060na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}