{"product_id":"carrier-py3gna024060ab-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V for PY3GNA024060AB","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V — HT01BD209 for Model PY3GNA024060AB\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNA024060AB\u003c\/strong\u003e packaged unit. The transformer steps line voltage down from 208\/240V to 24V AC, powering the low-voltage control circuit that drives your thermostat, contactor coil, and safety controls. When this transformer fails, the entire control circuit goes dead — the system will not respond to thermostat calls, contactors won't energize, and the unit will appear completely unresponsive. A failed transformer is often accompanied by a tripped or blown 3-amp control fuse.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/240V Primary | 24V Secondary | 40VA Rating | 50\/60 Hz | OEM Part# HT01BD209 | Replaces HT01BD207, HT01CN232, 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the factory control board. Undersized or off-tolerance aftermarket transformers can overheat, trip thermal cutoffs, or starve the control circuit under peak load — leading to intermittent faults and callbacks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Label all low-voltage wires before disconnecting the old transformer. Verify secondary voltage reads 24–28V AC after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer 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 PY3GNA024060AB\u003c\/strong\u003e packaged unit. Also compatible with select Bryant and Payne models sharing the same 40VA 208\/240V transformer specification — always verify your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640487563635,"sku":"CARRIE-PY3GNA024060AB-TRANSFORMER-HT01BD209","price":87.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640487596403,"sku":"CARRIE-PY3GNA024060AB-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_5c3893e8-1002-4b9c-846a-855d6e625162.jpg?v=1775025564","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna024060ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}