{"product_id":"carrier-py3pna042060aa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY3PNA042060AA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V for Model PY3PNA042060AA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3PNA042060AA\u003c\/strong\u003e packaged unit. The control transformer steps down line voltage (208\/240V) to the 24V signal voltage that powers your thermostat, contactor coil, gas valve, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dark — the thermostat displays nothing, the system refuses to respond to any call for heating or cooling, and a multimeter will read zero volts at the secondary terminals. Replacing it is the fastest way to restore full system operation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/240V primary input | 24V secondary output | 40VA power rating | 50\/60 Hz | OEM part number HT01BD209 | Factory-matched construction and VA rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA tolerances, protecting downstream components like contactors and gas valves from under- or over-voltage conditions. Generic units with loose tolerances can shorten the life of every 24V component on the circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before servicing. Tools needed: multimeter, flathead and Phillips screwdrivers, wire stripper, needle-nose pliers. Always photograph or label existing wiring before disconnecting. Verify 0V at secondary before handling.\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 Carrier \u003cstrong\u003ePY3PNA042060AA\u003c\/strong\u003e packaged unit. Cross-reference your unit's data plate to confirm 208\/240V primary and 24V\/40VA secondary specifications before ordering. Not sure it fits? Contact our HVAC parts specialists for free fitment verification before you buy — we ship same day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640388014451,"sku":"CARRIE-PY3PNA042060AA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640388047219,"sku":"CARRIE-PY3PNA042060AA-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_f1808c49-e714-430f-95de-ea8fcae42706.jpg?v=1782942398","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna042060aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}