{"product_id":"carrier-py3pna042060nb-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY3PNA042060NB","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD209 for Model PY3PNA042060NB\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3PNA042060NB\u003c\/strong\u003e packaged HVAC unit. The transformer steps down line voltage from 208\/240V to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the system goes completely silent: the thermostat goes blank, no calls for heating or cooling are answered, and nothing responds. In many cases, a failed transformer is caused by a short or overload downstream in the 24V circuit, so always inspect the full control wiring before replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input voltage 208\/240V | Output voltage 24V | Frequency 50\/60Hz | Power rating 40VA | OEM part #HT01BD209\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer built to exact factory VA and voltage tolerances. Generic transformers can run under-rated VA capacity, causing premature burnout and nuisance tripping of downstream fuses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and verify voltage is absent before touching wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Always label and photograph existing wire connections before disconnecting. Check for downstream 24V shorts before energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock — ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for \u003cstrong\u003eCarrier model PY3PNA042060NB\u003c\/strong\u003e packaged HVAC systems. Verify your unit's data plate shows a 208\/240V primary and 24V secondary control circuit before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640385982835,"sku":"CARRIE-PY3PNA042060NB-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640386015603,"sku":"CARRIE-PY3PNA042060NB-TRANSFORMER-HT01BD209-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD209_cb2bc30b-c6e8-48e9-91d8-fce562f1b4bd.jpg?v=1782942403","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna042060nb-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}